Question

Create a proportion using the form %/100 = is/of to represent the following word problem. 15 is 1 1/2% of what number?

Answer 1

Let the required number be x, then to create a proportion using the form
$\frac{\%}{100} = \frac{is}{of}$

Thus, let 15 be $1 \frac{1}{2} \%$ of x, then
$\frac{1 \frac{1}{2}}{100} = \frac{15}{x} \\ \\ \frac{ \frac{3}{2} }{100} =\frac{15}{x} \\ \\ \frac{3}{2}x=1,500 \\ \\ x= \frac{1,500\times2}{3} =1,000$

Therefore, 15 is $1 \frac{1}{2} \%$ of 1,000