Question

103 is 20% of what number

Answer 1

`x \cdot 20 \% =103 \\ \\ x\cdot (20)/(100)=103 \\ \\ (1)/(5)x=103 \ \ / \cdot 5\\\\x=515 \\ \\Answer: \ number \ is \ 515`

Answer 2

Use property of proportions:

103 ---------- 20%
x ---------- 100%


`x=(103*100)/(20)=(10300)/(20)=515`

So, 103 is 20% of 515