-98.18% is the change from 494 to 9
Calculation steps:
[( 9 - 494 ) ÷ 494] x 100 = -98.18%
Formula
Percentage change = [(9 - 494) / 494] x 100
Subtract the new number by the original number
9 - 494 = -485
-485 ÷ 494 = -0.9817813765182186
-0.9817813765182186 x 100 = -98.18%