-97.89% is the change from 427 to 9
Calculation steps:
[( 9 - 427 ) ÷ 427] x 100 = -97.89%
Formula
Percentage change = [(9 - 427) / 427] x 100
Subtract the new number by the original number
9 - 427 = -418
-418 ÷ 427 = -0.9789227166276346
-0.9789227166276346 x 100 = -97.89%