proportion

examples

1. What is the cost of 4 red dolls if 8 cost $56.00?

solution

8 red dolls cost $56.00

1 red doll cost $56 * 1

8 1

$7.00

4 red dolls cost $7 * 4

$28.00

2. Grandpa jogs 10km in 3 hours. How many Kilometres will he

jog in 6 hours?

solution

in 3hrs he jogs 10km

in 1hr he jogs 10 * 1

3 1

10 hr

3

in 6hrs he jogs 10 * 6

3 1

60

3

20km