Identify the quantities being compared
Write the quantities in the same units
Place the quantities in ratio form using a colon or fraction
Simplify the ratio by dividing both terms by their greatest common factor
Check that the ratio is in the same order as the comparison asked for
If needed, scale the ratio by multiplying or dividing both terms by the same number
For part-to-part ratios, compare one part to another part
For part-to-whole ratios, compare one part to the total
Convert decimals or fractions to whole numbers before simplifying
Verify the final ratio is fully reduced