Ratios, Proportions, Cross-multiplication, and Percent
Definitions and use of ratios, proportions, cross-multiplication, and percent are taught and demonstrated. Students are then given problems – including word problems – to apply what they have learned to real-world situations. This is followed by step-by-step solutions.
SAMPLE
The distance between two cities is 60 miles. After going 42 miles, what percentage of the distance has been traveled?
Make a ratio with x over 100. Then solve for x.