-27.58% is the change from 620 to 449
Calculation steps:
[( 449 - 620 ) ÷ 620] x 100 = -27.58%
Formula
Percentage change = [(449 - 620) / 620] x 100
Subtract the new number by the original number
449 - 620 = -171
-171 ÷ 620 = -0.27580645161290324
-0.27580645161290324 x 100 = -27.58%