-5.49% is the change from 656 to 620
Calculation steps:
[( 620 - 656 ) ÷ 656] x 100 = -5.49%
Formula
Percentage change = [(620 - 656) / 656] x 100
Subtract the new number by the original number
620 - 656 = -36
-36 ÷ 656 = -0.054878048780487805
-0.054878048780487805 x 100 = -5.49%