At first, a pot contained
15 ℓ of water. Erika added another
14 ℓ of water into the pot. Then she used
39 of all the water in the pot. How much water did Erika use? Express your answer as a fraction in its simplest form.
Total volume of water in the pot after Erika added more water into the pot
= 15 + 14
= 420 + 520
= 920 ℓ
9 u = 920
1 u = 920 ÷ 9 = 920 x 19 = 120
Volume of water that Erika used
= 3 u
= 3 x 120
= 320 ℓ
Answer(s): 320 ℓ