-80.6% is the change from 799 to 155
Calculation steps:
[( 155 - 799 ) ÷ 799] x 100 = -80.6%
Formula
Percentage change = [(155 - 799) / 799] x 100
Subtract the new number by the original number
155 - 799 = -644
-644 ÷ 799 = -0.8060075093867334
-0.8060075093867334 x 100 = -80.6%