-8.1% is the change from 679 to 624
Calculation steps:
[( 624 - 679 ) ÷ 679] x 100 = -8.1%
Formula
Percentage change = [(624 - 679) / 679] x 100
Subtract the new number by the original number
624 - 679 = -55
-55 ÷ 679 = -0.08100147275405008
-0.08100147275405008 x 100 = -8.1%