-93.1% is the change from 435 to 30
Calculation steps:
[( 30 - 435 ) ÷ 435] x 100 = -93.1%
Formula
Percentage change = [(30 - 435) / 435] x 100
Subtract the new number by the original number
30 - 435 = -405
-405 ÷ 435 = -0.9310344827586207
-0.9310344827586207 x 100 = -93.1%