Question

A man buys a book for Rs 80 and sells it for rs 100. His gain% is
20%
25%
120%
125%​

Answer 1

Answer:

25%

Step-by-step explanation:

Cost price of book =Rs.80

Selling price of book =Rs.100

Since (SP)>(CP), so there is a gain

Gain =(SP)−(CP)

=Rs.(100−80)

=Rs.20

Gain %={(gain/CP)×100}

={20/80)×100}

={20/20)×25}

=25%

Answer 2

Gain Percent = 25%

Step-by-step explanation:

GIVEN

Cost Price = ₹80

Selling Price = ₹100

___________________________

TO FIND

Gain Percent

___________________________

We know that,

Profit = Selling Price - Cost Price

Profit = 100 - 80

Profit = 20

Profit = ₹20

___________________________

We know that,

Profit Percent = ( Profit × 100 ) / Cost Price

Profit Percent = ( 20 × 100 ) / 80

Profit Percent = 200 / 80

Profit Percent = 25

Profit Percent = 25%

Gain Percent = 25%

___________________________

IMPORTANT

If the profit percent is given and we have to find the selling price

Then

Selling Price = ( 100 + Profit% ) × Cost Price / 100

If the loss percent is given and we have to find the selling price

Then

Selling Price = ( 100 - Loss% ) × Cost Price / 100

When selling price and loss percent is give and we have to find the cost price

Then

Cost Price = ( Selling Price × 100 ) / ( 100 - Loss Percent )

When selling price and profit percent is give and we have to find the cost price

Then

Cost Price = ( Selling Price × 100 ) / ( 100 + Profit Percent )