-17.19% is the change from 64 to 53
Calculation steps:
[( 53 - 64 ) ÷ 64] x 100 = -17.19%
Formula
Percentage change = [(53 - 64) / 64] x 100
Subtract the new number by the original number
53 - 64 = -11
-11 ÷ 64 = -0.171875
-0.171875 x 100 = -17.19%
Example