-91.8% is the change from 988 to 81
Calculation steps:
[( 81 - 988 ) ÷ 988] x 100 = -91.8%
Formula
Percentage change = [(81 - 988) / 988] x 100
Subtract the new number by the original number
81 - 988 = -907
-907 ÷ 988 = -0.9180161943319838
-0.9180161943319838 x 100 = -91.8%