-77.39% is the change from 721 to 163
Calculation steps:
[( 163 - 721 ) ÷ 721] x 100 = -77.39%
Formula
Percentage change = [(163 - 721) / 721] x 100
Subtract the new number by the original number
163 - 721 = -558
-558 ÷ 721 = -0.7739251040221914
-0.7739251040221914 x 100 = -77.39%