-27.7% is the change from 621 to 449
Calculation steps:
[( 449 - 621 ) ÷ 621] x 100 = -27.7%
Formula
Percentage change = [(449 - 621) / 621] x 100
Subtract the new number by the original number
449 - 621 = -172
-172 ÷ 621 = -0.27697262479871176
-0.27697262479871176 x 100 = -27.7%