-58.4% is the change from 940 to 391
Calculation steps:
[( 391 - 940 ) ÷ 940] x 100 = -58.4%
Formula
Percentage change = [(391 - 940) / 940] x 100
Subtract the new number by the original number
391 - 940 = -549
-549 ÷ 940 = -0.5840425531914893
-0.5840425531914893 x 100 = -58.4%