-91.25% is the change from 971 to 85
Calculation steps:
[( 85 - 971 ) ÷ 971] x 100 = -91.25%
Formula
Percentage change = [(85 - 971) / 971] x 100
Subtract the new number by the original number
85 - 971 = -886
-886 ÷ 971 = -0.9124613800205973
-0.9124613800205973 x 100 = -91.25%