-91.3% is the change from 977 to 85
Calculation steps:
[( 85 - 977 ) ÷ 977] x 100 = -91.3%
Formula
Percentage change = [(85 - 977) / 977] x 100
Subtract the new number by the original number
85 - 977 = -892
-892 ÷ 977 = -0.9129989764585466
-0.9129989764585466 x 100 = -91.3%