-80.2% is the change from 798 to 158
Calculation steps:
[( 158 - 798 ) ÷ 798] x 100 = -80.2%
Formula
Percentage change = [(158 - 798) / 798] x 100
Subtract the new number by the original number
158 - 798 = -640
-640 ÷ 798 = -0.8020050125313283
-0.8020050125313283 x 100 = -80.2%