-35.2% is the change from 804 to 521
Calculation steps:
[( 521 - 804 ) ÷ 804] x 100 = -35.2%
Formula
Percentage change = [(521 - 804) / 804] x 100
Subtract the new number by the original number
521 - 804 = -283
-283 ÷ 804 = -0.35199004975124376
-0.35199004975124376 x 100 = -35.2%