-54.08% is the change from 686 to 315
Calculation steps:
[( 315 - 686 ) ÷ 686] x 100 = -54.08%
Formula
Percentage change = [(315 - 686) / 686] x 100
Subtract the new number by the original number
315 - 686 = -371
-371 ÷ 686 = -0.5408163265306123
-0.5408163265306123 x 100 = -54.08%