-80.57% is the change from 813 to 158
Calculation steps:
[( 158 - 813 ) ÷ 813] x 100 = -80.57%
Formula
Percentage change = [(158 - 813) / 813] x 100
Subtract the new number by the original number
158 - 813 = -655
-655 ÷ 813 = -0.8056580565805658
-0.8056580565805658 x 100 = -80.57%