-18.94% is the change from 528 to 428
Calculation steps:
[( 428 - 528 ) ÷ 528] x 100 = -18.94%
Formula
Percentage change = [(428 - 528) / 528] x 100
Subtract the new number by the original number
428 - 528 = -100
-100 ÷ 528 = -0.1893939393939394
-0.1893939393939394 x 100 = -18.94%