-36.05% is the change from 821 to 525
Calculation steps:
[( 525 - 821 ) ÷ 821] x 100 = -36.05%
Formula
Percentage change = [(525 - 821) / 821] x 100
Subtract the new number by the original number
525 - 821 = -296
-296 ÷ 821 = -0.36053593179049936
-0.36053593179049936 x 100 = -36.05%