-93.09% is the change from 434 to 30
Calculation steps:
[( 30 - 434 ) ÷ 434] x 100 = -93.09%
Formula
Percentage change = [(30 - 434) / 434] x 100
Subtract the new number by the original number
30 - 434 = -404
-404 ÷ 434 = -0.9308755760368663
-0.9308755760368663 x 100 = -93.09%