Raeann purchased a bottle of syrup. She used ⁵₇ of the syrup in April. She then used the remaining syrup in May and June in the ratio 1 : 2. Given that the amount of the syrup used in June was 1.32 ℓ less than that in April, how many millilitres of syrup did the bottle contain at first?

April	May	June	Total
5x3	2x3		7x3
	1x2	2x2
15 u	2 u	4 u	21 u

Total volume of May and June is combined repeated identity. Make the total volume of May and June the same. LCM of 2 and 3 is 6.

Volume of less syrup syrup in the bottle used in June than April
= 15 u - 4 u
= 11 u

11 u = 1.32 

1 u = 1.32 ÷ 11 = 0.12

Amount of syrup in the bottle at first
= 21 u
= 21 x 0.12
= 2.52 ℓ

1 ℓ = 1000 mℓ

Amount of syrup in the bottle at first
= 2.52 x 1000
= 2520 mℓ

Answer(s): 2520 mℓ