-82.53% is the change from 813 to 142
Calculation steps:
[( 142 - 813 ) ÷ 813] x 100 = -82.53%
Formula
Percentage change = [(142 - 813) / 813] x 100
Subtract the new number by the original number
142 - 813 = -671
-671 ÷ 813 = -0.8253382533825339
-0.8253382533825339 x 100 = -82.53%