What percent of the paint is red?
Convert the information into a fraction. Remember that the "whole" in this case is the total parts of both red and yellow paint.
Use a Giant One to change the fraction to an equivalent fraction with a denominator of
The numerator is the percentage of red paint.
What is the simplified ratio of yellow to red paint?
Convert the information into a fraction. But this time the numerator is the parts of yellow paint and the denominator is the parts of red paint.
Reduce the fraction as much as possible.