-35.52% is the change from 808 to 521
Calculation steps:
[( 521 - 808 ) ÷ 808] x 100 = -35.52%
Formula
Percentage change = [(521 - 808) / 808] x 100
Subtract the new number by the original number
521 - 808 = -287
-287 ÷ 808 = -0.3551980198019802
-0.3551980198019802 x 100 = -35.52%