-93.9% is the change from 492 to 30
Calculation steps:
[( 30 - 492 ) ÷ 492] x 100 = -93.9%
Formula
Percentage change = [(30 - 492) / 492] x 100
Subtract the new number by the original number
30 - 492 = -462
-462 ÷ 492 = -0.9390243902439024
-0.9390243902439024 x 100 = -93.9%