Victoria purchased a bottle of syrup. She used ⁵₇ of the syrup in February. She then used the remaining syrup in March and April in the ratio 2 : 5. Given that the amount of the syrup used in April was 1 ℓ less than that in February, how many millilitres of syrup did the bottle contain at first?

February	March	April	Total
5x7	2x7		7x7
	2x2	5x2
35 u	4 u	10 u	49 u

Total volume of March and April is combined repeated identity. Make the total volume of March and April the same. LCM of 2 and 7 is 14.

Volume of less syrup syrup in the bottle used in April than February
= 35 u - 10 u
= 25 u

25 u = 1 

1 u = 1 ÷ 25 = 0.04

Amount of syrup in the bottle at first
= 49 u
= 49 x 0.04
= 1.96 ℓ

1 ℓ = 1000 mℓ

Amount of syrup in the bottle at first
= 1.96 x 1000
= 1960 mℓ

Answer(s): 1960 mℓ