-90.05% is the change from 422 to 42
Calculation steps:
[( 42 - 422 ) ÷ 422] x 100 = -90.05%
Formula
Percentage change = [(42 - 422) / 422] x 100
Subtract the new number by the original number
42 - 422 = -380
-380 ÷ 422 = -0.9004739336492891
-0.9004739336492891 x 100 = -90.05%