-40.49% is the change from 531 to 316
Calculation steps:
[( 316 - 531 ) ÷ 531] x 100 = -40.49%
Formula
Percentage change = [(316 - 531) / 531] x 100
Subtract the new number by the original number
316 - 531 = -215
-215 ÷ 531 = -0.4048964218455744
-0.4048964218455744 x 100 = -40.49%