Question

80% of p is 20. What is p? 75% of b is 12. What is b?

Answer 1

`80\% \: of \: p = 20 \\ (80)/(100) p = 20 \\ (4)/(5) p = 20 \\ p = (20 * 5)/(4) \\ \boxed{p = 25}`

25 is the right answer.

`75\% \: of \: b = 12 \\ (75)/(100) b = 12 \\ (3)/(4) b = 12 \\ b = (12 * 4)/(3) \\ \boxed{b = 16}`

16 is the right answer.

Answer 2

Explanation:

80% of p = 20

=> 0.8p = 20, p = 20 / 0.8 = 25.

75% of b = 12

=> 0.75b = 12, b = 12 / 0.75 = 16.