30=12m
you divide both sides by 12
so 30/12 is 2.5
Finished:Left
8:1
8/1 = 72/x
Cross Multiply
8x=72
divide each side by 8
x=9
She already finished 72 and has 9 remaining
Total = Finished + Remaining = 72 + 9 = 81
Multiply the values then either divide by 2 or multiply by 2
