-80.35% is the change from 799 to 157
Calculation steps:
[( 157 - 799 ) ÷ 799] x 100 = -80.35%
Formula
Percentage change = [(157 - 799) / 799] x 100
Subtract the new number by the original number
157 - 799 = -642
-642 ÷ 799 = -0.8035043804755945
-0.8035043804755945 x 100 = -80.35%