-64% is the change from 100 to 36
Calculation steps:
[( 36 - 100 ) ÷ 100] x 100 = -64%
Formula
Percentage change = [(36 - 100) / 100] x 100
Subtract the new number by the original number
36 - 100 = -64
-64 ÷ 100 = -0.64
-0.64 x 100 = -64%
Example