-35.56% is the change from 807 to 520
Calculation steps:
[( 520 - 807 ) ÷ 807] x 100 = -35.56%
Formula
Percentage change = [(520 - 807) / 807] x 100
Subtract the new number by the original number
520 - 807 = -287
-287 ÷ 807 = -0.355638166047088
-0.355638166047088 x 100 = -35.56%