# Class 8 Maths chapter- comparing-quantities Formula

#### Math Formulas

- Amount after n years is given by

- Compound interest = (amount) - (principal).

If the rates be p%, q% and r% during the 1^{st}, 2^{nd} and 3^{rd} years respectively then amount after 3 years

- If principal = Rs P, rate = R% per annum and time = n years then

(i) Amount after n years (compounded annually)

(ii) Amount after n years (compounded half-yearly)

(iii) Amount after n years (compounded quarterly)

## Formula

- To find CP when SP and gain% or loss% are given:

### Important Formulas of Comparing Quantities Class 8 Maths

- Cost Price = Selling Price – Profit
- Cost Price = Selling Price + Loss
- Selling Price = Cost Price + Profit
- Selling Price = Cost Price – Loss
- Profit (P) = Selling Price - Cost Price
- Loss = Cost Price - Selling Price
- Profit % = 100
- Loss % = 100
- Discount (D) = Marked Price (M.P.) – Selling price (S.P)
- Discount % = 100
- Price = Selling Price = Marked Price – Discount

### Important Sales Tax Formulas:-

- Bill Amount = Cost of commodity + Sales tax
- Value added tax (VAT) = Tax charged – Tax paid.
- Value added tax = Tax % (Selling Price – Cost Price)

Use Physics Wallah **NCERT Solutions for Class 8 Maths** for reference. Students can also get the **Important Questions for class 8 Maths** chapter Comparing Quantities from here. If any students need to take the online test to check their concepts or undertstanding then they can visit **Maths online quiz for class 8**.

### Frequently Asked Question (FAQs)

**Q1. Which Book is Most Preferred for practicing Class 8 Maths Formulas?**

**Ans.** NCERT books are considered the most important for practicing CBSE maths, and if you want to know all the essential Class 8 Maths formulas, including all formulas of Comparing Quantities Class 8.

**Q2. Is Physics Wallah Offers Free Class 8 Practice Questions Online?**

**Ans.** Physics Wallah e-learning provides students free Classes and 8 practice questions to learn and score excellently in their examinations.

**Q3. How to Make the use of Class 8 Maths important Formulas?**

**Ans. **The Class 8 Maths formulas list will significantly help you when you get stuck in questions while practicing the subject or even when writing the exam. The important formulas and attributes will be very much useful for you to go through a revision before the exam. This way, students are not only able to prepare well but score better.

**Q4. How will Class 8 Maths Formulas Help you get Through Class 8?**

**Ans.** These essential formulas for Comparing Quantities Class 8 are taken from the elementary Class 8 NCERT textbook. Hence, it’ll prove quite helpful for you no matter what board of education you are studying in. These formulas are on the dedicated page of Physics Wallah, which is made available unit-wise and class-wise so that you don’t have to go back and forth. Therefore, Class 8 Maths Comparing Quantities and all-important formulas will come in handy during revision.