-4.38% is the change from 685 to 655
Calculation steps:
[( 655 - 685 ) ÷ 685] x 100 = -4.38%
Formula
Percentage change = [(655 - 685) / 685] x 100
Subtract the new number by the original number
655 - 685 = -30
-30 ÷ 685 = -0.043795620437956206
-0.043795620437956206 x 100 = -4.38%