-54.69% is the change from 64 to 29
Calculation steps:
[( 29 - 64 ) ÷ 64] x 100 = -54.69%
Formula
Percentage change = [(29 - 64) / 64] x 100
Subtract the new number by the original number
29 - 64 = -35
-35 ÷ 64 = -0.546875
-0.546875 x 100 = -54.69%
Example