-91.6% is the change from 964 to 81
Calculation steps:
[( 81 - 964 ) ÷ 964] x 100 = -91.6%
Formula
Percentage change = [(81 - 964) / 964] x 100
Subtract the new number by the original number
81 - 964 = -883
-883 ÷ 964 = -0.9159751037344398
-0.9159751037344398 x 100 = -91.6%