-15.87% is the change from 813 to 684
Calculation steps:
[( 684 - 813 ) ÷ 813] x 100 = -15.87%
Formula
Percentage change = [(684 - 813) / 813] x 100
Subtract the new number by the original number
684 - 813 = -129
-129 ÷ 813 = -0.15867158671586715
-0.15867158671586715 x 100 = -15.87%