Watch out for the same relationship repeated in a word problem. For example, they might tell you that a certain paint contains 3 parts of white paint for every 1 part of blue paint, then ask how many gallons of blue paint you'll need when using 12 gallons of white paint. I see the relationship of blue paint to white paint used twice here. It's proportion time!

Watch the Virtual GED Class video below for a complete explanation and tons of worked example problems.