-99.05% is the change from 422 to 4
Calculation steps:
[( 4 - 422 ) ÷ 422] x 100 = -99.05%
Formula
Percentage change = [(4 - 422) / 422] x 100
Subtract the new number by the original number
4 - 422 = -418
-418 ÷ 422 = -0.990521327014218
-0.990521327014218 x 100 = -99.05%