-50.47% is the change from 422 to 209
Calculation steps:
[( 209 - 422 ) ÷ 422] x 100 = -50.47%
Formula
Percentage change = [(209 - 422) / 422] x 100
Subtract the new number by the original number
209 - 422 = -213
-213 ÷ 422 = -0.504739336492891
-0.504739336492891 x 100 = -50.47%