-15.9% is the change from 497 to 418
Calculation steps:
[( 418 - 497 ) ÷ 497] x 100 = -15.9%
Formula
Percentage change = [(418 - 497) / 497] x 100
Subtract the new number by the original number
418 - 497 = -79
-79 ÷ 497 = -0.158953722334004
-0.158953722334004 x 100 = -15.9%