10 is 13.89% of 72.
Step 1: Translate the words into an equation.
10 | is | what percent | of | 72 |
10 | = | x | $ \cdot $ | 72 |
Step 2: Solve for $ x $.
$$ \begin{aligned} 10 &= x \cdot 72 \\[1.2 em] 72 \cdot x &= 10 \\[1.2 em] x &= \dfrac{ 10 }{ 72 } \\[1.2 em] x &= 0.1389 \end{aligned} $$Step 3: Express $ x $ as a percentage.
$$ x = 0.1389 = 0.1389 ~~\cdot~~ 100 \% = 13.89 \% $$