Question

Tell whether the ratios form a proportion.

1 to 3 and 7 to 21

Answer 1

yes they form a proportion

Explanation:

1 to 3 and 7 to 21 are equal

we can check this by multiplying each number in the 1 to 3 ratio by 7 to make it equal with the other ratio, 7 to 21.

(sorry if this is confusing but I hope it helped)