At first, a pail contained
15 ℓ of water. Esther added another
12 ℓ of water into the pail. Then she used
77 of all the water in the pail. How much water did Esther use? Express your answer as a fraction in its simplest form.
Total volume of water in the pail after Esther added more water into the pail
= 15 + 12
= 210 + 510
= 710 ℓ
7 u = 710
1 u = 710 ÷ 7 = 710 x 17 = 110
Volume of water that Esther used
= 7 u
= 7 x 110
= 710 ℓ
Answer(s): 710 ℓ