-27.9% is the change from 620 to 447
Calculation steps:
[( 447 - 620 ) ÷ 620] x 100 = -27.9%
Formula
Percentage change = [(447 - 620) / 620] x 100
Subtract the new number by the original number
447 - 620 = -173
-173 ÷ 620 = -0.27903225806451615
-0.27903225806451615 x 100 = -27.9%