-59.29% is the change from 980 to 399
Calculation steps:
[( 399 - 980 ) ÷ 980] x 100 = -59.29%
Formula
Percentage change = [(399 - 980) / 980] x 100
Subtract the new number by the original number
399 - 980 = -581
-581 ÷ 980 = -0.5928571428571429
-0.5928571428571429 x 100 = -59.29%