-5.1% is the change from 686 to 651
Calculation steps:
[( 651 - 686 ) ÷ 686] x 100 = -5.1%
Formula
Percentage change = [(651 - 686) / 686] x 100
Subtract the new number by the original number
651 - 686 = -35
-35 ÷ 686 = -0.05102040816326531
-0.05102040816326531 x 100 = -5.1%