there are 26 green,30 white,30 purple,14 blue what would be the minimum number for the blue to be 24%

as it stands, there are 100 marbles, with blue making up 14%

So, for it to be 24%, you need

14/24 * 100 = 58.3

24% of 58 = 13.92
So, 14 marbles would be about 14% of 58