Jean purchased a bottle of cooking wine. She used ²₅ of the cooking wine in February. She then used the remaining cooking wine in March and April in the ratio 3 : 4. Given that the amount of the cooking wine used in April was 0.14 ℓ less than that in February, how many millilitres of cooking wine did the bottle contain at first?

February	March	April	Total
2x7	3x7		5x7
	3x3	4x3
14 u	9 u	12 u	35 u

Total volume of March and April is combined repeated identity. Make the total volume of March and April the same. LCM of 3 and 7 is 21.

Volume of less cooking wine syrup in the bottle used in April than February
= 14 u - 12 u
= 2 u

2 u = 0.14 

1 u = 0.14 ÷ 2 = 0.07

Amount of cooking wine in the bottle at first
= 35 u
= 35 x 0.07
= 2.45 ℓ

1 ℓ = 1000 mℓ

Amount of cooking wine in the bottle at first
= 2.45 x 1000
= 2450 mℓ

Answer(s): 2450 mℓ