Jaslyn purchased a bottle of mango syrup to make drinks. She used ⁵₉ of the syrup in February. She then used the remaining syrup in March and April in the ratio 1 : 4. Given that the amount of the mango syrup used in February was 1.26 ℓ more than that in March, how many millilitres of mango syrup did the bottle contain at first?

February	March	April	Total
5x5	4x5		9x5
	1x4	4x4
25 u	4 u	16 u	45 u

Total volume of March and April is combined repeated identity.  Make the total volume of March and April the same.  LCM of 4 and 5 is 20.

Volume of more mango syrup in the bottle used in February than March
= 25 u - 4 u
= 21 u

21 u = 1.26 

1 u = 1.26 ÷ 21 = 0.06

Amount of mango syrup in the bottle at first
= 45 u
= 45 x 0.06
= 2.7 ℓ

1 ℓ = 1000 mℓ

Amount of mango syrup in the bottle at first
= 2.7 x 1000
= 2700 mℓ

Answer(s): 2700 mℓ