-16.86% is the change from 528 to 439
Calculation steps:
[( 439 - 528 ) ÷ 528] x 100 = -16.86%
Formula
Percentage change = [(439 - 528) / 528] x 100
Subtract the new number by the original number
439 - 528 = -89
-89 ÷ 528 = -0.16856060606060605
-0.16856060606060605 x 100 = -16.86%