-35.69% is the change from 821 to 528
Calculation steps:
[( 528 - 821 ) ÷ 821] x 100 = -35.69%
Formula
Percentage change = [(528 - 821) / 821] x 100
Subtract the new number by the original number
528 - 821 = -293
-293 ÷ 821 = -0.3568818514007308
-0.3568818514007308 x 100 = -35.69%