-64% is the change from 200 to 72
Calculation steps:
[( 72 - 200 ) ÷ 200] x 100 = -64%
Formula
Percentage change = [(72 - 200) / 200] x 100
Subtract the new number by the original number
72 - 200 = -128
-128 ÷ 200 = -0.64
-0.64 x 100 = -64%
Example