Premium topic
Ratios & Proportions
Write and reduce ratios, solve proportions by cross-multiplication, find unit rates, and scale recipes or blueprints.
Worked Example
Solve 3/4 = x/20
Given: Find x
- 1
Cross-multiply
3 · 20 = 4 · x
Worked Example
Scale recipe ×2.5
Given: 2 cups flour serves 4; need 10
- 1
Scale factor
10 / 4 = 2.5
Timed Game · 6 problems
02:00
Answer 6 problems in 2 min. Timer auto-stops.