-35.91% is the change from 621 to 398
Calculation steps:
[( 398 - 621 ) ÷ 621] x 100 = -35.91%
Formula
Percentage change = [(398 - 621) / 621] x 100
Subtract the new number by the original number
398 - 621 = -223
-223 ÷ 621 = -0.35909822866344604
-0.35909822866344604 x 100 = -35.91%