-92.81% is the change from 417 to 30
Calculation steps:
[( 30 - 417 ) ÷ 417] x 100 = -92.81%
Formula
Percentage change = [(30 - 417) / 417] x 100
Subtract the new number by the original number
30 - 417 = -387
-387 ÷ 417 = -0.9280575539568345
-0.9280575539568345 x 100 = -92.81%