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