-90.95% is the change from 420 to 38
Calculation steps:
[( 38 - 420 ) ÷ 420] x 100 = -90.95%
Formula
Percentage change = [(38 - 420) / 420] x 100
Subtract the new number by the original number
38 - 420 = -382
-382 ÷ 420 = -0.9095238095238095
-0.9095238095238095 x 100 = -90.95%