-9.49% is the change from 685 to 620
Calculation steps:
[( 620 - 685 ) ÷ 685] x 100 = -9.49%
Formula
Percentage change = [(620 - 685) / 685] x 100
Subtract the new number by the original number
620 - 685 = -65
-65 ÷ 685 = -0.0948905109489051
-0.0948905109489051 x 100 = -9.49%