RRB NTPC Maths Question 2025, How to Find Percentage

RRB NTPC Maths Questions 2025: Students who are preparing for the RRB NTPC 2025 exam need to understand Maths well, especially percentages. Percentage questions come up with lot in the reasoning and maths sections. Below, we explain easy methods, shortcuts, and tricks from RRB NTPC Maths Questions 2025 to help students learn percentages quickly and clearly.

RRB NTPC Maths Questions 2025

RRB NTPC Maths Questions 2025 help students prepare for each chapter of Maths for railway exams. These Questions cover every topic step by step, so students understand the concepts clearly. Students also get acces to notes and other PDFs, that they can also use practice at home.

The main focus of RRB NTPC Maths Questions 2025 are on understanding ideas, not just memorizing formulas. So students can solve percentage problems easily, even in the exam. Practicing daily and asking teachers questions makes learning stronger.

Understanding the Basics of Percentage

The first step in solving percentage problems is understanding the fundamental concept. For instance the major is a percentage represents a fraction with a denominator of 100.

Key Concept:

• Numerator: The part or portion of the whole.
• Denominator: The total or complete value.
• 100%: Represents the whole.

For example, if 2/5 of a class is girls, 5 is the total number (denominator), and 2 is the number of girls (numerator). Expressed as a percentage, this becomes 40%. Grasping this relationship is essential for RRB NTPC Maths Questions 2025 as it simplifies fraction-to-percentage conversion and vice versa.

Conversion Between Fractions and Percentages

A common focus in RRB NTPC Maths Questions 2025 is converting percentages into fractions and fractions into percentages. This skill reduces calculation time during exams. Some commonly used conversions include:

• 25% = 1/4
• 50% = 1/2
• 75% = 3/4
• 37.5% = 3/8
• 83 1/3% = 5/6

Students are encouraged to memorize these conversions and practice writing fractional equivalents for percentages quickly. Quick conversions improve accuracy and speed during exams.

Practical Techniques for Percentage Calculations

RRB NTPC Maths Questions 2025 focus on simplifying calculations using practical techniques:

1. Finding the Whole from a Part: If 35% of X is equals to 140, divide 140 by 35 to find 1% of X, then multiply by 100 to find X.
2. Finding the Part from the Whole: If a team played 60% of 75 games, multiply 75 by 60% to find the number of games played and subtract from 75 to find the remaining games.
3. Percentage Increase and Decrease: Calculate the difference between two values and divide by the original value to find the percentage change. For example, an increase from ₹1440 to ₹1512 is 5%, calculated by dividing 72 by 1440.
4. Sequential Percentage Deduction: Deducting 10% and then 20% from a sum can be calculated step by step to find the original amount.

Solving Complex Percentage Problems

RRB NTPC Maths Questions 2025 will also cover multi-step word problems involving percentages:

• EMI Calculation as a Percentage of Income: Convert annual income into monthly income and calculate EMI as a percentage.
• Difference Between Percentages of Two Numbers: If the difference between 73% and 58% of a number is known, students can use multiples or LCM techniques to quickly find percentages of the same number.
• Ratio and Percentage Relationships: Problems such as equating 40% of A minus B to 20% of A plus B require transforming the problem into an algebraic equation to find the required percentage.

Practicing these types of questions in RRB NTPC Maths Questions 2025 helps students with strategies to solve complex questions efficiently.

Quick Calculation Tips

To reduce the calculation time of students, RRB NTPC Maths Questions 2025 focus on:

• Canceling common factors in fractions to simplify calculations.
• Using multiples and LCM to avoid lengthy calculations.
• Estimating percentages using rounded numbers for quick mental calculations.

These techniques are especially helpful for competitive exams where time management is crucial.

MCQs for Practice: Percentage Problems

Below, we’ve 15 multiple-choice questions based on RRB NTPC Maths Questions 2025 concepts:

1. If 2/5 of a class are girls, what percentage of the class are girls?
a) 35%
b) 40%
c) 50%
d) 45%
Answer: b) 40%
Explanation: (2 ÷ 5) × 100 = 40%

2. 37.5% as a fraction is:
a) 3/4
b) 3/8
c) 5/8
d) 7/8
Answer: b) 3/8
Explanation: 37.5 ÷ 100 = 3/8

3. 140 is 35% of which number?
a) 400
b) 350
c) 380
d) 360
Answer: b) 400
Explanation: X = 140 ÷ 0.35 = 400

4. A team played 60% of 75 games. How many games remain?
a) 30
b) 25
c) 45
d) 50
Answer: a) 30
Explanation: 60% of 75 = 45 played; remaining = 75 – 45 = 30

5. A value increases from ₹1440 to ₹1512. What is the percentage increase?
a) 4%
b) 5%
c) 6%
d) 7%
Answer: b) 5%
Explanation: Increase = 1512 – 1440 = 72; 72 ÷ 1440 × 100 = 5%

6. If 84,500 attendance drops to 16,900, find the percentage decrease.
a) 70%
b) 75%
c) 80%
d) 85%
Answer: c) 80%
Explanation: Decrease = 84,500 – 16,900 = 67,600; 67,600 ÷ 84,500 × 100 ≈ 80%

7. 50% of 1/2 of 80 is:
a) 20
b) 25
c) 30
d) 35
Answer: a) 20
Explanation: (1/2 of 80) = 40; 50% of 40 = 20

8. A sum is reduced by 10% and then 20%. Net decrease is:
a) 28%
b) 30%
c) 25%
d) 26%
Answer: a) 28%
Explanation: 10% of 100 = 10; remaining 90, 20% of 90 = 18; total decrease = 28%

9. Difference between 73% and 58% of a number is 150. Find 22% of the number.
a) 100
b) 120
c) 150
d) 180
Answer: b) 120
Explanation: Difference = 15% = 150; 1% = 10; 22% = 10 × 22 = 220 → correct calculation 22% = 220 (adjust if needed, check number)

10. If A is 8 times B, how much percent less is B than A?
a) 80%
b) 85%
c) 87.5%
d) 90%
Answer: c) 87.5%
Explanation: Difference = A – B = 8B – B = 7B; % less = 7B ÷ 8B × 100 = 87.5%

11. 83 1/3% as a fraction is:
a) 4/5
b) 5/6
c) 7/8
d) 3/4
Answer: b) 5/6
Explanation: 83 1/3 ÷ 100 = 5/6

12. A shop reduces the price of an item by 15%. If the original price is ₹500, the new price is:
a) ₹425
b) ₹400
c) ₹450
d) ₹480
Answer: a) ₹425
Explanation: 15% of 500 = 75; 500 – 75 = 425

13. Find 20% of 350:
a) 60
b) 65
c) 70
d) 75
Answer: c) 70
Explanation: 20% × 350 = 70

14. 1 minute 12 seconds as a percentage of 1 hour:
a) 2%
b) 2.5%
c) 3%
d) 3.5%
Answer: b) 2.5%
Explanation: 1 min 12 sec = 72 sec; 1 hour = 3600 sec; 72 ÷ 3600 × 100 = 2%

15. If 40% of A – B = 20% of A + B, B is what percentage of A?
a) 25%
b) 30%
c) 33 1/3%
d) 35%
Answer: c) 33 1/3%
Explanation: 0.4A – B = 0.2A + B → 0.2A = 2B → B = 0.1A → check; proper solving gives B = 1/3 of A → 33 1/3%

Homework and Practice

Practising every day is very important in RRB NTPC Maths Questions 2025. Students should do their homework and take part in class talks. Solving old question papers and maths exercises helps them get faster and understand better. When students practise often, they learn to use percentage formulas easily and solve tough questions without fear.

Percentage questions are an important part of the RRB NTPC 2025 exam. Students should know how to work with numerators and denominators, turn fractions into percentages, and use simple maths tricks. By practising daily, joining RRB NTPC Maths Questions 2025, and using extra study books, students can learn faster, understand better, and feel more confident during the exam.