Question

if 6a-8b=0 and c=12b, the ratio of a to c is equivalent to the ratio of one to what number?

Answer 1

6a=8b
3a=4b
c=3*(4b)=3*3a=9a
c=9a

Answer 2

First find the ratio of a:b since you know 6a=8b, then reduce to get 3a=4b. Since c=12b, let's multiply everything by 3 so 9a=12b. This means 9a=c. This is the same as 9a=1c so now you can easily get your answer:)