-80.2% is the change from 495 to 98
Calculation steps:
[( 98 - 495 ) ÷ 495] x 100 = -80.2%
Formula
Percentage change = [(98 - 495) / 495] x 100
Subtract the new number by the original number
98 - 495 = -397
-397 ÷ 495 = -0.802020202020202
-0.802020202020202 x 100 = -80.2%