-73.88% is the change from 980 to 256
Calculation steps:
[( 256 - 980 ) ÷ 980] x 100 = -73.88%
Formula
Percentage change = [(256 - 980) / 980] x 100
Subtract the new number by the original number
256 - 980 = -724
-724 ÷ 980 = -0.7387755102040816
-0.7387755102040816 x 100 = -73.88%