Question

if eggs are bought at 10 for rs 8 and sold at 4 for rs 5 find the gain or loss percent

Answer 1

C.P of 10 eggs =8
C.P of 1 egg =8/10
=4/5
S.P of 4 eggs =5
S.P of 1 egg =5/4
Gain =S.P-C.P
=5/4-4/5
=9/20
Gain%=Gain/C.P×100
Now answer is in the above pic.

Answer 2

C.P of 10 eggs =8
C.P of 1 egg =8/10
=4/5
S.P of 4 eggs =5
S.P of 1 egg =5/4
Gain =S.P-C.P
=5/4-4/5
=9/20
Gain%=Gain/C.P×100
Now answer is in the above pic.