PSLE
Victoria had a bottle of orange juice. She drank 1170 mℓ of orange juice in the morning and ³₅ of remaining orange juice in the evening. After that, there was ¹₉ a bottle of orange juice left. How much of the orange juice did she drink in the evening?
Fraction of the remaining orange juice left in the end
= 1 - ³₅
= ²₅

The remaining orange juice left in the end is equal to ¹₉ of the bottle of orange juice.
Make numerators the same.
LCM of 2 and 1 is 2.
 
²₅ of the remaining orange juice = ¹₉ of the total orange juice
²₅ of the remaining orange juice = ²₁₈ of the total orange juice

Volume of orange juice that she drank in the morning
= 18 u - 5 u
= 13 u

13 u = 1170

1 u = 1170 ÷ 13 = 90

Volume of orange juice that she drank in the evening
= 3 u
= 3 x 90
= 270 mℓ

Answer(s): 270 mℓ