-80.04% is the change from 496 to 99
Calculation steps:
[( 99 - 496 ) ÷ 496] x 100 = -80.04%
Formula
Percentage change = [(99 - 496) / 496] x 100
Subtract the new number by the original number
99 - 496 = -397
-397 ÷ 496 = -0.8004032258064516
-0.8004032258064516 x 100 = -80.04%