-83.1% is the change from 799 to 135
Calculation steps:
[( 135 - 799 ) ÷ 799] x 100 = -83.1%
Formula
Percentage change = [(135 - 799) / 799] x 100
Subtract the new number by the original number
135 - 799 = -664
-664 ÷ 799 = -0.8310387984981227
-0.8310387984981227 x 100 = -83.1%