-92.92% is the change from 424 to 30
Calculation steps:
[( 30 - 424 ) ÷ 424] x 100 = -92.92%
Formula
Percentage change = [(30 - 424) / 424] x 100
Subtract the new number by the original number
30 - 424 = -394
-394 ÷ 424 = -0.9292452830188679
-0.9292452830188679 x 100 = -92.92%