-91.29% is the change from 930 to 81
Calculation steps:
[( 81 - 930 ) ÷ 930] x 100 = -91.29%
Formula
Percentage change = [(81 - 930) / 930] x 100
Subtract the new number by the original number
81 - 930 = -849
-849 ÷ 930 = -0.9129032258064517
-0.9129032258064517 x 100 = -91.29%