-29.79% is the change from 621 to 436
Calculation steps:
[( 436 - 621 ) ÷ 621] x 100 = -29.79%
Formula
Percentage change = [(436 - 621) / 621] x 100
Subtract the new number by the original number
436 - 621 = -185
-185 ÷ 621 = -0.29790660225442833
-0.29790660225442833 x 100 = -29.79%