-35.36% is the change from 806 to 521
Calculation steps:
[( 521 - 806 ) ÷ 806] x 100 = -35.36%
Formula
Percentage change = [(521 - 806) / 806] x 100
Subtract the new number by the original number
521 - 806 = -285
-285 ÷ 806 = -0.3535980148883375
-0.3535980148883375 x 100 = -35.36%