Question

Use a unit rate to find the unknown value of 18/? = 21/7

Answer 1

First solve for 21/7 and you get 18/? = 3.

Then you work it backwards and say 3 * what = 18

Answer is 6

Answer 2

Answer:6

Explanation:

18/? =21/7

you are going to cross multiply

? × 21 = 18 × 7

? × 21 = 126

Then you divide bothside by 21

? = 126/21

? = 6