-36.68% is the change from 807 to 511
Calculation steps:
[( 511 - 807 ) ÷ 807] x 100 = -36.68%
Formula
Percentage change = [(511 - 807) / 807] x 100
Subtract the new number by the original number
511 - 807 = -296
-296 ÷ 807 = -0.3667905824039653
-0.3667905824039653 x 100 = -36.68%