A

Amal

Sp-cp=profit.......(1)

2sp-cp=3profit......(2)

Subtracting equ1 from equ2

We get sp=2profit....(3)

Substituting in equ(1)

2profit-cp=profit

So cp=profit

This means profit % =100

2

A

Amal

Profit=100%..since cost price=profit. Please check the image

1