-80.48% is the change from 497 to 97
Calculation steps:
[( 97 - 497 ) ÷ 497] x 100 = -80.48%
Formula
Percentage change = [(97 - 497) / 497] x 100
Subtract the new number by the original number
97 - 497 = -400
-400 ÷ 497 = -0.8048289738430584
-0.8048289738430584 x 100 = -80.48%