-8.16% is the change from 980 to 900
Calculation steps:
[( 900 - 980 ) ÷ 980] x 100 = -8.16%
Formula
Percentage change = [(900 - 980) / 980] x 100
Subtract the new number by the original number
900 - 980 = -80
-80 ÷ 980 = -0.08163265306122448
-0.08163265306122448 x 100 = -8.16%