-90.44% is the change from 900 to 86
Calculation steps:
[( 86 - 900 ) ÷ 900] x 100 = -90.44%
Formula
Percentage change = [(86 - 900) / 900] x 100
Subtract the new number by the original number
86 - 900 = -814
-814 ÷ 900 = -0.9044444444444445
-0.9044444444444445 x 100 = -90.44%