The increase from 40 to 64 is: 60%
Multiply 64 by 1.25 and get 80.
24% of 64= 24% * 64= 0.24 * 64= 15.36
60% increase.
37.5% of 64= 37.5% * 64= 0.375 * 64= 24
37.5%
123
64
25.5814% decrease.
+64%
25% 80-64 = 16 16/64 = 1/4
The percentage of increase from 52 to 64 is 23 percent.