-90.23% is the change from 880 to 86
Calculation steps:
[( 86 - 880 ) ÷ 880] x 100 = -90.23%
Formula
Percentage change = [(86 - 880) / 880] x 100
Subtract the new number by the original number
86 - 880 = -794
-794 ÷ 880 = -0.9022727272727272
-0.9022727272727272 x 100 = -90.23%