-34.79% is the change from 799 to 521
Calculation steps:
[( 521 - 799 ) ÷ 799] x 100 = -34.79%
Formula
Percentage change = [(521 - 799) / 799] x 100
Subtract the new number by the original number
521 - 799 = -278
-278 ÷ 799 = -0.3479349186483104
-0.3479349186483104 x 100 = -34.79%