-8.92% is the change from 684 to 623
Calculation steps:
[( 623 - 684 ) ÷ 684] x 100 = -8.92%
Formula
Percentage change = [(623 - 684) / 684] x 100
Subtract the new number by the original number
623 - 684 = -61
-61 ÷ 684 = -0.0891812865497076
-0.0891812865497076 x 100 = -8.92%