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ATQ,
Let the quantity of syrup and water in the mixture initially be 3b litres and b litres respectively.
Ratio of syrup to water = 3b : b = 3 : 1
After removing 24 litres of the mixture,
Quantity of mixture left = 60 litres
Quantity of syrup left = 60 × (3/4) = 45 litres
Quantity of water = 60 - 45 = 15 litres
Quantity of water after addition of 12 litres = 15 + 12 = 27 litres
Required percentage = (27 / 45) × 100 = 60%
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