Question

Annu bought buttons at 5 for Rs 2 how much did the shopkeeper sell for if he gained 20%?

Answer 1

Number of buttons= 5

Cost price of buttons= Rs.2= CP

Gain= 20%= P%

Selling price of buttons= ?= SP

SP=CP×(100+P%/100)

SP= 2×(100+20/100)

SP= 2×(120/100)

SP= 2×6/5

SP= 12/5

SP= 2.4

Answer: The shopkeeper sold the 5 buttons for Rs. 2.4 to gain 20%.

Hope it helps! :)

Answer 2

5 buttons = 2 rs
gain 20%

2/5 × 20/100
40/ 500
0.08 answer
0.08rs is the 20% gain
then

2 +0.08 = 2.08 answer