Question

Gopal gave away 25% of his stamps and had 450 stamps left. How
many stamps did he give away?

Answer 1

150 stamps

Explanation:

100% - 25% = 75%

`(y)/(450) :(25)/(75)`

y × 75 = 25 × 450

75y = 11250

75y ÷ 75 = 11250 ÷ 75

y = 150