-76.28% is the change from 721 to 171
Calculation steps:
[( 171 - 721 ) ÷ 721] x 100 = -76.28%
Formula
Percentage change = [(171 - 721) / 721] x 100
Subtract the new number by the original number
171 - 721 = -550
-550 ÷ 721 = -0.7628294036061026
-0.7628294036061026 x 100 = -76.28%