Identify the quantity being measured
Write the rate as a ratio of two different units
Use the formula rate = distance ÷ time, work = rate × time, or part = rate × total as needed
List the known values
Assign a variable to the unknown
Set up an equation using the rate relationship
Keep units consistent
Solve the equation for the unknown
Check that the answer has the correct units
Verify the answer makes sense in the context of the problem