Hazel purchased a bottle of pear syrup to make drinks. She used ²₅ of the syrup in April. She then used the remaining syrup in May and June in the ratio 1 : 3. Given that the amount of the pear syrup used in April was 0.55 ℓ more than that in May, how many millilitres of pear syrup did the bottle contain at first?

April	May	June	Total
2x4	3x4		5x4
	1x3	3x3
8 u	3 u	9 u	20 u

Total volume of May and June is combined repeated identity.  Make the total volume of May and June the same.  LCM of 3 and 4 is 12.

Volume of more pear syrup in the bottle used in April than May
= 8 u - 3 u
= 5 u

5 u = 0.55 

1 u = 0.55 ÷ 5 = 0.11

Amount of pear syrup in the bottle at first
= 20 u
= 20 x 0.11
= 2.2 ℓ

1 ℓ = 1000 mℓ

Amount of pear syrup in the bottle at first
= 2.2 x 1000
= 2200 mℓ

Answer(s): 2200 mℓ