-35.28% is the change from 805 to 521
Calculation steps:
[( 521 - 805 ) ÷ 805] x 100 = -35.28%
Formula
Percentage change = [(521 - 805) / 805] x 100
Subtract the new number by the original number
521 - 805 = -284
-284 ÷ 805 = -0.3527950310559006
-0.3527950310559006 x 100 = -35.28%