-34.96% is the change from 801 to 521
Calculation steps:
[( 521 - 801 ) ÷ 801] x 100 = -34.96%
Formula
Percentage change = [(521 - 801) / 801] x 100
Subtract the new number by the original number
521 - 801 = -280
-280 ÷ 801 = -0.3495630461922597
-0.3495630461922597 x 100 = -34.96%