To find the percentage of the goal that Leon reached, you can use the formula:
\[ \text{Percentage} = \left(\frac{\text{Amount Saved}}{\text{Goal}} \right) \times 100 \]
In this case, Leon saved $120 and his goal was $100. Plugging in these values:
\[ \text{Percentage} = \left(\frac{120}{100}\right) \times 100 \]
Calculating this gives:
\[ \text{Percentage} = 1.2 \times 100 = 120% \]
Leon reached 120% of his goal.