-15.62% is the change from 813 to 686
Calculation steps:
[( 686 - 813 ) ÷ 813] x 100 = -15.62%
Formula
Percentage change = [(686 - 813) / 813] x 100
Subtract the new number by the original number
686 - 813 = -127
-127 ÷ 813 = -0.15621156211562115
-0.15621156211562115 x 100 = -15.62%