-21.4% is the change from 528 to 415
Calculation steps:
[( 415 - 528 ) ÷ 528] x 100 = -21.4%
Formula
Percentage change = [(415 - 528) / 528] x 100
Subtract the new number by the original number
415 - 528 = -113
-113 ÷ 528 = -0.21401515151515152
-0.21401515151515152 x 100 = -21.4%