-13.63% is the change from 800 to 691
Calculation steps:
[( 691 - 800 ) ÷ 800] x 100 = -13.63%
Formula
Percentage change = [(691 - 800) / 800] x 100
Subtract the new number by the original number
691 - 800 = -109
-109 ÷ 800 = -0.13625
-0.13625 x 100 = -13.63%