Mrs Raj baked some muffins. $\frac{1}{4}$ of them were blueberry muffins, $\frac{2}{5}$ of them were chocolate muffins and the rest were strawberry muffins. What was the ratio of the number of strawberry muffins to the number of blueberry muffins to the number of chocolate muffins?

1. Find the fraction of strawberry muffins

Fraction of strawberry muffins $= 1 - \frac{1}{4} - \frac{2}{5}$
$= 1 - \frac{5}{20} - \frac{8}{20}$
$= \frac{7}{20}$

2. Express the fractions with a common denominator to find the ratio

Blueberry muffins $= \frac{1}{4} = \frac{5}{20}$
Chocolate muffins $= \frac{2}{5} = \frac{8}{20}$
Strawberry muffins $= \frac{7}{20}$

3. Form the required ratio

Ratio of Strawberry : Blueberry : Chocolate
$= 7 : 5 : 8$