At first, a pail contained
15 ℓ of water. Min added another
14 ℓ of water into the pail. Then she used
79 of all the water in the pail. How much water did Min use? Express your answer as a fraction in its simplest form.
Total volume of water in the pail after Min added more water into the pail
= 15 + 14
= 420 + 520
= 920 ℓ
9 u = 920
1 u = 920 ÷ 9 = 920 x 19 = 120
Volume of water that Min used
= 7 u
= 7 x 120
= 720 ℓ
Answer(s): 720 ℓ