-90.48% is the change from 42 to 4
Calculation steps:
[( 4 - 42 ) ÷ 42] x 100 = -90.48%
Formula
Percentage change = [(4 - 42) / 42] x 100
Subtract the new number by the original number
4 - 42 = -38
-38 ÷ 42 = -0.9047619047619048
-0.9047619047619048 x 100 = -90.48%