-90.23% is the change from 430 to 42
Calculation steps:
[( 42 - 430 ) ÷ 430] x 100 = -90.23%
Formula
Percentage change = [(42 - 430) / 430] x 100
Subtract the new number by the original number
42 - 430 = -388
-388 ÷ 430 = -0.9023255813953488
-0.9023255813953488 x 100 = -90.23%