-69.3% is the change from 531 to 163
Calculation steps:
[( 163 - 531 ) ÷ 531] x 100 = -69.3%
Formula
Percentage change = [(163 - 531) / 531] x 100
Subtract the new number by the original number
163 - 531 = -368
-368 ÷ 531 = -0.6930320150659134
-0.6930320150659134 x 100 = -69.3%