-91.59% is the change from 987 to 83
Calculation steps:
[( 83 - 987 ) ÷ 987] x 100 = -91.59%
Formula
Percentage change = [(83 - 987) / 987] x 100
Subtract the new number by the original number
83 - 987 = -904
-904 ÷ 987 = -0.9159067882472138
-0.9159067882472138 x 100 = -91.59%