Dana purchased a bottle of pear syrup to make drinks. She used ⁵₉ of the syrup in April. She then used the remaining syrup in May and June in the ratio 5 : 9. Given that the amount of the pear syrup used in April was 1 ℓ more than that in May, how many millilitres of pear syrup did the bottle contain at first?

April	May	June	Total
5x7	4x7		9x7
	5x2	9x2
35 u	10 u	18 u	63 u

Total volume of May and June is combined repeated identity.  Make the total volume of May and June the same.  LCM of 4 and 14 is 28.

Volume of more pear syrup in the bottle used in April than May
= 35 u - 10 u
= 25 u

25 u = 1 

1 u = 1 ÷ 25 = 0.04

Amount of pear syrup in the bottle at first
= 63 u
= 63 x 0.04
= 2.52 ℓ

1 ℓ = 1000 mℓ

Amount of pear syrup in the bottle at first
= 2.52 x 1000
= 2520 mℓ

Answer(s): 2520 mℓ