-18.37% is the change from 980 to 800
Calculation steps:
[( 800 - 980 ) ÷ 980] x 100 = -18.37%
Formula
Percentage change = [(800 - 980) / 980] x 100
Subtract the new number by the original number
800 - 980 = -180
-180 ÷ 980 = -0.1836734693877551
-0.1836734693877551 x 100 = -18.37%