-20.29% is the change from 621 to 495
Calculation steps:
[( 495 - 621 ) ÷ 621] x 100 = -20.29%
Formula
Percentage change = [(495 - 621) / 621] x 100
Subtract the new number by the original number
495 - 621 = -126
-126 ÷ 621 = -0.2028985507246377
-0.2028985507246377 x 100 = -20.29%