Find factors of 12 and 21
Divide 3 from both numerator and denominator.
(12/21)/(3/3) = 4/7
4/7 is your ratio equivalent to 12/21
hope this helps
Are u able to take a picture of the whole question?
Hey There!
80+70 is 150
180
-150
is 30 so 30 must be your answer
Hope This Helps!!!
The graph is shown below.
