Grade 7 · Math

Grade 7 Math — Proportions questions and answers

Cross multiply and unit rates. Written in American English for students, parents, and teachers in the United States.

Practice quiz

Open a card to see the answer. These are original practice items for US elementary students — not a state test copy.

1. A proportion says two ratios are

Answer: equal

a/b = c/d.

2. To solve 3/4 = x/20, x =

Answer: 15

Cross multiply: 3 × 20 = 4x.

3. A unit rate of 60 miles in 2 hours is

Answer: 30 miles per hour

Divide miles by hours.

4. If 5 apples cost $4, 10 apples cost

Answer: $8

Double the apples, double the cost (same rate).

5. Cross multiplying 2/5 = 6/x gives

Answer: x = 15

2x = 30.

6. A 2 cm drawing represents 8 m. The scale is

Answer: 1 cm : 4 m

Divide both parts by 2.

7. 15 is 25% of what number?

Answer: 60

15 = 0.25x → x = 60.

8. If y varies directly with x and y = 10 when x = 2, y when x = 6 is

Answer: 30

y = 5x.