-84.26% is the change from 813 to 128
Calculation steps:
[( 128 - 813 ) ÷ 813] x 100 = -84.26%
Formula
Percentage change = [(128 - 813) / 813] x 100
Subtract the new number by the original number
128 - 813 = -685
-685 ÷ 813 = -0.8425584255842559
-0.8425584255842559 x 100 = -84.26%