-99.6% is the change from 494 to 2
Calculation steps:
[( 2 - 494 ) ÷ 494] x 100 = -99.6%
Formula
Percentage change = [(2 - 494) / 494] x 100
Subtract the new number by the original number
2 - 494 = -492
-492 ÷ 494 = -0.9959514170040485
-0.9959514170040485 x 100 = -99.6%