-9.04% is the change from 686 to 624
Calculation steps:
[( 624 - 686 ) ÷ 686] x 100 = -9.04%
Formula
Percentage change = [(624 - 686) / 686] x 100
Subtract the new number by the original number
624 - 686 = -62
-62 ÷ 686 = -0.09037900874635568
-0.09037900874635568 x 100 = -9.04%