Zoe purchased a bottle of kiwi 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 2 : 7. Given that the amount of the kiwi syrup used in February was 1.15 ℓ more than that in March, how many millilitres of kiwi syrup did the bottle contain at first?

February	March	April	Total
3x9	2x9		5x9
	2x2	7x2
27 u	4 u	14 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 2 and 9 is 18.

Volume of more kiwi syrup in the bottle used in February than March
= 27 u - 4 u
= 23 u

23 u = 1.15 

1 u = 1.15 ÷ 23 = 0.05

Amount of kiwi syrup in the bottle at first
= 45 u
= 45 x 0.05
= 2.25 ℓ

1 ℓ = 1000 mℓ

Amount of kiwi syrup in the bottle at first
= 2.25 x 1000
= 2250 mℓ

Answer(s): 2250 mℓ