-29.31% is the change from 621 to 439
Calculation steps:
[( 439 - 621 ) ÷ 621] x 100 = -29.31%
Formula
Percentage change = [(439 - 621) / 621] x 100
Subtract the new number by the original number
439 - 621 = -182
-182 ÷ 621 = -0.29307568438003223
-0.29307568438003223 x 100 = -29.31%