To represent the quantity of olives to pepperonis, we need to find the number of olives and the number of pepperonis that Francis is using.
Francis is using:
- 20 olives (from 1 can)
- 25 pepperonis (from 1 package)
The ratio of olives to pepperonis can be expressed as:
\[ \text{Ratio of olives to pepperonis} = \frac{\text{Number of olives}}{\text{Number of pepperonis}} = \frac{20}{25} \]
To simplify this ratio, we can divide both numbers by their greatest common divisor, which is 5:
\[ \frac{20 \div 5}{25 \div 5} = \frac{4}{5} \]
Therefore, the ratio of olives to pepperonis is 4:5.