-93.96% is the change from 497 to 30
Calculation steps:
[( 30 - 497 ) ÷ 497] x 100 = -93.96%
Formula
Percentage change = [(30 - 497) / 497] x 100
Subtract the new number by the original number
30 - 497 = -467
-467 ÷ 497 = -0.9396378269617707
-0.9396378269617707 x 100 = -93.96%