Question

A book seller buys abook for Rs 240 and sells it for Rs 312. find gain and gain percent​

Answer 1

Step-by-step explanation:

gain= sp _cp

=312_240=72

gain%= gain/cp×100

=72/240×100

=30%

Answer 2

Step-by-step explanation:

Cost price of a book= ₹ 240

Selling price of a book = ₹ 312

Gain = sp - cp

= ₹312 - ₹240 = ₹ 72

Gain = ₹ 72

Percentage of gain = gain × 100

cp

= 72 × 100 = 30%

240