-29.47% is the change from 621 to 438
Calculation steps:
[( 438 - 621 ) ÷ 621] x 100 = -29.47%
Formula
Percentage change = [(438 - 621) / 621] x 100
Subtract the new number by the original number
438 - 621 = -183
-183 ÷ 621 = -0.2946859903381642
-0.2946859903381642 x 100 = -29.47%