Question

a grocer buy eggs at 10 for rupees 8 and sells at 8 for rupees 10 find his gain or loss percent

Answer 1

Cost price per egg = 8/10 = 0.8.

Selling price per egg = 10/8 = 1.25.

Gain = 1.25 - 0.8 = 0.45

%gain = (0.45 *100)/0.8 = 56.25%.

Answer 2

54.375(answer) how?

profit%=profit/cost price *100  

profit=CP of 8 eggs=6.4 (by unitary method) ;profit=10-6.4 =3.6

then;profit%=3.6/6.4*100= 54.375 (ans)