-8.05% is the change from 497 to 457
Calculation steps:
[( 457 - 497 ) ÷ 497] x 100 = -8.05%
Formula
Percentage change = [(457 - 497) / 497] x 100
Subtract the new number by the original number
457 - 497 = -40
-40 ÷ 497 = -0.08048289738430583
-0.08048289738430583 x 100 = -8.05%