17.19% is the change from 64 to 75
Calculation steps:
[( 75 - 64 ) ÷ 64] x 100 = 17.19%
Formula
Percentage change = [(75 - 64) / 64] x 100
Subtract the new number by the original number
75 - 64 = 11
11 ÷ 64 = 0.171875
0.171875 x 100 = 17.19%
Example