# RBSE Class 8 Maths Notes Chapter 8 Comparing Quantities

These comprehensive RBSE Class 8 Maths Notes Chapter 8 Comparing Quantities will give a brief overview of all the concepts.

Rajasthan Board RBSE Solutions for Class 8 Maths in Hindi Medium & English Medium are part of RBSE Solutions for Class 8. Students can also read RBSE Class 8 Maths Important Questions for exam preparation. Students can also go through RBSE Class 8 Maths Notes to understand and remember the concepts easily. Practicing the class 8 maths chapter 6 try these solutions will help students analyse their level of preparation.

## RBSE Class 8 Maths Chapter 8 Notes Comparing Quantities

→ The word ‘percent’ means in every hundred or per hundred.

→ To convert a fraction into percentage, we multiply it by 100.

→ To convert percentage into fraction, we divide the number by 100.

→ Cost Price (C.P.): The price for which an article is bought is called cost price.

→ Selling Price (S.P.) is the price for which an article is sold.

→ Profit: When S.P. > C.P., then there is a profit.
Profit = S.P. - C.P.

→ Loss: When S.P. < C.P., then there is a loss.
Loss = C.P. - S.P.

→ Profit % = $$\frac{\text { Profit } \times 100}{\text { C.P. }}$$

→ Loss % = $$\frac{{Loss} \times 100}{\text { C.P. }}$$

→ S.P = $$\frac{(100+\text { Profit \%) } \times \text { C.P. }}{100}$$ or $$\frac{(100-\text { Loss } \%) \times \text { C.P. }}{100}$$

→ C.P. = $$\frac{\text { SP. } \times 100}{100+\text { Profit } \%}$$ or $$\frac{\text { SP. } \times 100}{100-\text { Loss } \%}$$

→ Discount is a reduction given on marked price
Discount = Marked Price - Sell Price

→ Discount can be calculated when discount percentage is given.
Discount = Discount % of Marked Price.

→ Additional expenses made after buying an article are included in the cost price and are known as overhead expenses.
CP. = Buying price + Overhead expenses.

→ Sales tax is charged on the sell of an item by the government and is added to the bill amount.
Sales tax = Tax % of Bill Amount.

→ Compound interest is the interest calculated on the previous year’s amount.
A = P + I

→ Amount when interest is compounded annualy
= P$$\left(1+\frac{\mathrm{R}}{100}\right)^{\mathrm{n}}$$ P is principal, R is rate of interest, n is time period.

→ Amount when interest is compounded half yearly
= P$$\left(1+\frac{R}{200}\right)^{2 n}$$ { $${\frac{R}{2}}$$is half yearly rate, 2n = number of half years.}

Last Updated on June 1, 2022, 2:38 p.m.
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Published June 1, 2022