Question

find the number that makes the ratio equivalent to 12:10.
□:70

Explanation:

Step1: Find the scale factor

The second term of the original ratio is 10, and in the new ratio it's 70. So the scale factor is $70\div10 = 7$.

Step2: Multiply the first term by the scale factor

The first term of the original ratio is 12. Multiply it by 7: $12\times7 = 84$.

Answer:

84