13 is 59.09% of 22.
Step 1: Translate the words into an equation.
| 13 | is | what percent | of | 22 |
| 13 | = | x | $ \cdot $ | 22 |
Step 2: Solve for $ x $.
$$ \begin{aligned} 13 &= x \cdot 22 \\[1.2 em] 22 \cdot x &= 13 \\[1.2 em] x &= \dfrac{ 13 }{ 22 } \\[1.2 em] x &= 0.5909 \end{aligned} $$Step 3: Express $ x $ as a percentage.
$$ x = 0.5909 = 0.5909 ~~\cdot~~ 100 \% = 59.09 \% $$