Answer:
75
Explanation:
Translate the problem into an equation and solve the equation.
"15 is 20% of a number"
15 = 20% * n
15 = 20/100 * n
15 = 0.2n
Multiply both sides by 5.
75 = n
Answer: The number is 75.
Check: 20% of 75 = 0.2 * 75 = 15
The answer is correct.