Question

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

Answer 1

Answer:

$80\% \: of \: p = 20 \\ \frac{80}{100} p = 20 \\ \frac{4}{5} p = 20 \\ p = \frac{20 \times 5}{4} \\ \boxed{p = 25}$

25 is the right answer.

$75\% \: of \: b = 12 \\ \frac{75}{100} b = 12 \\ \frac{3}{4} b = 12 \\ b = \frac{12 \times 4}{3} \\ \boxed{b = 16}$

16 is the right answer.

Answer 2

Step-by-step 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.