Cathy purchased a bottle of dragonfruit syrup to make drinks. She used ³₅ of the syrup in February. She then used the remaining syrup in March and April in the ratio 1 : 2. Given that the amount of the dragonfruit syrup used in February was 1.26 ℓ more than that in March, how many millilitres of dragonfruit syrup did the bottle contain at first?

February	March	April	Total
3x3	2x3		5x3
	1x2	2x2
9 u	2 u	4 u	15 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 3 is 6.

Volume of more dragonfruit syrup in the bottle used in February than March
= 9 u - 2 u
= 7 u

7 u = 1.26 

1 u = 1.26 ÷ 7 = 0.18

Amount of dragonfruit syrup in the bottle at first
= 15 u
= 15 x 0.18
= 2.7 ℓ

1 ℓ = 1000 mℓ

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

Answer(s): 2700 mℓ