-91.47% is the change from 997 to 85
Calculation steps:
[( 85 - 997 ) ÷ 997] x 100 = -91.47%
Formula
Percentage change = [(85 - 997) / 997] x 100
Subtract the new number by the original number
85 - 997 = -912
-912 ÷ 997 = -0.9147442326980942
-0.9147442326980942 x 100 = -91.47%