-9.05% is the change from 685 to 623
Calculation steps:
[( 623 - 685 ) ÷ 685] x 100 = -9.05%
Formula
Percentage change = [(623 - 685) / 685] x 100
Subtract the new number by the original number
623 - 685 = -62
-62 ÷ 685 = -0.0905109489051095
-0.0905109489051095 x 100 = -9.05%