Let us assume the percentage to be = x%
Then
64 * x% = 24
64x/100 = 24
64x = 24 * 100
64x = 2400
x = 2400/64
= 37.5 percent
Then 24 is 37.5% of 64.The procedure shown for
solving this kind of problems is one of the simplest possible. I hope the
procedure is clear enough for you to understand. In future you can always use
this procedure for solving similar problems without requiring any outside help.