-50.71% is the change from 424 to 209
Calculation steps:
[( 209 - 424 ) ÷ 424] x 100 = -50.71%
Formula
Percentage change = [(209 - 424) / 424] x 100
Subtract the new number by the original number
209 - 424 = -215
-215 ÷ 424 = -0.5070754716981132
-0.5070754716981132 x 100 = -50.71%