To write a fraction as a percent, first remember that a percent is a ratio of a number to 100. If we want to convert \(\frac{3}{20}\) to a percent, we need to find a fraction equivalent to \(\frac{3}{20}\) that has a 100 in the denominator. We can do this by setting up a proportion.
\(\frac{3}{20}\) = \(\frac{n}{100}\)
Now, we can use cross products to find the missing value.
3 × 100 = 300
20 × n = 20n
300 = 20n ← Divide both sides by 20.
15 = n
Therefore, \(\frac{3}{20}\) as a percent would be 15%.
