-91.08% is the change from 930 to 83
Calculation steps:
[( 83 - 930 ) ÷ 930] x 100 = -91.08%
Formula
Percentage change = [(83 - 930) / 930] x 100
Subtract the new number by the original number
83 - 930 = -847
-847 ÷ 930 = -0.910752688172043
-0.910752688172043 x 100 = -91.08%