-91.66% is the change from 971 to 81
Calculation steps:
[( 81 - 971 ) ÷ 971] x 100 = -91.66%
Formula
Percentage change = [(81 - 971) / 971] x 100
Subtract the new number by the original number
81 - 971 = -890
-890 ÷ 971 = -0.9165808444902163
-0.9165808444902163 x 100 = -91.66%