-27.12% is the change from 531 to 387
Calculation steps:
[( 387 - 531 ) ÷ 531] x 100 = -27.12%
Formula
Percentage change = [(387 - 531) / 531] x 100
Subtract the new number by the original number
387 - 531 = -144
-144 ÷ 531 = -0.2711864406779661
-0.2711864406779661 x 100 = -27.12%