-91.53% is the change from 980 to 83
Calculation steps:
[( 83 - 980 ) ÷ 980] x 100 = -91.53%
Formula
Percentage change = [(83 - 980) / 980] x 100
Subtract the new number by the original number
83 - 980 = -897
-897 ÷ 980 = -0.9153061224489796
-0.9153061224489796 x 100 = -91.53%