-31.61% is the change from 620 to 424
Calculation steps:
[( 424 - 620 ) ÷ 620] x 100 = -31.61%
Formula
Percentage change = [(424 - 620) / 620] x 100
Subtract the new number by the original number
424 - 620 = -196
-196 ÷ 620 = -0.3161290322580645
-0.3161290322580645 x 100 = -31.61%