-70.42% is the change from 497 to 147
Calculation steps:
[( 147 - 497 ) ÷ 497] x 100 = -70.42%
Formula
Percentage change = [(147 - 497) / 497] x 100
Subtract the new number by the original number
147 - 497 = -350
-350 ÷ 497 = -0.704225352112676
-0.704225352112676 x 100 = -70.42%