-0.87% is the change from 807 to 800
Calculation steps:
[( 800 - 807 ) ÷ 807] x 100 = -0.87%
Formula
Percentage change = [(800 - 807) / 807] x 100
Subtract the new number by the original number
800 - 807 = -7
-7 ÷ 807 = -0.008674101610904586
-0.008674101610904586 x 100 = -0.87%