Question

72 is 45% of ______-

Answer 1

45% * x=72

45/100 *x=72

45x/100=72

45x=7200      /:45

x=160

⇒72 is 45% of 160.

Answer 2

$\frac{72}{x} = \frac{45}{100}$
^^^^^percent proportion^^^^^^^
multiply 72 x 100 = 7200
divide 7200 ÷ 45 = 160
72 is 45% of 160.