-40% is the change from 980 to 588
Calculation steps:
[( 588 - 980 ) ÷ 980] x 100 = -40%
Formula
Percentage change = [(588 - 980) / 980] x 100
Subtract the new number by the original number
588 - 980 = -392
-392 ÷ 980 = -0.4
-0.4 x 100 = -40%
Example