Question

A mixture of milk and water contains 60% milk and remaining water. how much water should be added (in percentage) in mixture to reverse the ratio?

Answer 1

milk = 60%
water = remaining 
         = 100 - 60
         = 40%
milk : water = 60 : 40

Answer 2

in a mixture of milk n water
milk= 60%
n remaining means water = 40%

let the ratio of milk n water is 60/40=3:2

we have to reverse the ratio means
2:3

so first we add 20% of water to balance it
n then we add extra 30% water, so that the ratio will reverse

40%+20%+30%= 90%

let calculate ratio of milk n water now
60/90= 2:3

so the answer is u will add 50% of water more to reverse this ratio.