LET’S TRY ONE
Paint uses 2 cups blue for 3 cups white. With 8 cups blue, how much white?
12
8 is four times 2, so white must also be four times 3: 12 cups.
Learning steps & teaching tips
Keep a ratio equivalent while scaling both quantities.
- Find the scale factor and apply it to both ratio terms.
- Work through the example. Explain how its evidence supports the answer.
- Try a new question; use the explanation to check your thinking.
Try it together
Write or draw your own example with different numbers. Solve it, then ask a partner to check the method as well as the answer.
Find the scale factor and apply it to both ratio terms.