900 is 200000% of 0.45.
Step 1: Translate the words into an equation.
900 | is | what percent | of | 0.45 |
900 | = | x | $ \cdot $ | 0.45 |
Step 2: Solve for $ x $.
$$ \begin{aligned} 900 &= x \cdot 0.45 \\[1.2 em] 0.45 \cdot x &= 900 \\[1.2 em] x &= \dfrac{ 900 }{ 0.45 } \\[1.2 em] x &= 2000 \end{aligned} $$Step 3: Express $ x $ as a percentage.
$$ x = 2000 = 2000 ~~\cdot~~ 100 \% = 200000 \% $$