Question

A book is bought for Rs 80 and sold for Rs 100 by a vendor. Find his gain per cent.​

Answer 1

Question :-

⇒ A book is bought for Rs 80 and sold for Rs 100 by a vendor. Find his gain per cent.​

Given :-

⇒ Cost Price of the book = Rs. 80

⇒ Selling Price of the book = Rs. 100

To Find :-

⇒ The gain percent

Solution :-

⇒ $\sf As\;we\;know\;that\; ,$

$\Large{\underbrace{\sf{\red{Gain\;Percent\;=\;\frac{SP-CP}{CP}\times100\%}}}}$

$\sf = \frac{100-80}{80}\times 100\% \\\\= \frac{20}{80}\times 100\%\\\\= \frac{1}{4} \times 100\% \\\\= 25\%$

∴ The gain percent is 25 %

Answer 2

Answer:

20/80×100=25 ...............

Step-by-step explanation:

Question :-

⇒ A book is bought for Rs 80 and sold for Rs 100 by a vendor. Find his gain per cent.

Given :-

⇒ Cost Price of the book = Rs. 80

⇒ Selling Price of the book = Rs. 100

To Find :-

⇒ The gain percent

Solution :-

100−80

×100%

=

80

20

×100%

=

4

1

×100%

=25%

∴ The gain percent is 25 %