-79.48% is the change from 497 to 102
Calculation steps:
[( 102 - 497 ) ÷ 497] x 100 = -79.48%
Formula
Percentage change = [(102 - 497) / 497] x 100
Subtract the new number by the original number
102 - 497 = -395
-395 ÷ 497 = -0.7947686116700201
-0.7947686116700201 x 100 = -79.48%