-80.24% is the change from 491 to 97
Calculation steps:
[( 97 - 491 ) ÷ 491] x 100 = -80.24%
Formula
Percentage change = [(97 - 491) / 491] x 100
Subtract the new number by the original number
97 - 491 = -394
-394 ÷ 491 = -0.8024439918533605
-0.8024439918533605 x 100 = -80.24%