-30.11% is the change from 621 to 434
Calculation steps:
[( 434 - 621 ) ÷ 621] x 100 = -30.11%
Formula
Percentage change = [(434 - 621) / 621] x 100
Subtract the new number by the original number
434 - 621 = -187
-187 ÷ 621 = -0.30112721417069244
-0.30112721417069244 x 100 = -30.11%