Question

15% of 80 is 60% of what number?

Answer 1

the unknown number is 20

Step-by-step explanation:

15% of 80 = 15% × 80

= 0.15 × 80

= 12

60% of a number

let the number = y

60% of y = 60% ×y

= 0.6 ×y

= 0.6y

15% of 80 = 60% of the number

12 = 0.6y

divide both sides by 0.6:

`\begin{gathered} (0.6y)/(0.6)\text{ = }(12)/(0.6) \\ y\text{ = 20} \end{gathered}`

Hence, the unknown number is 20