-91.31% is the change from 978 to 85
Calculation steps:
[( 85 - 978 ) ÷ 978] x 100 = -91.31%
Formula
Percentage change = [(85 - 978) / 978] x 100
Subtract the new number by the original number
85 - 978 = -893
-893 ÷ 978 = -0.9130879345603272
-0.9130879345603272 x 100 = -91.31%