-6.48% is the change from 617 to 577
Calculation steps:
[( 577 - 617 ) ÷ 617] x 100 = -6.48%
Formula
Percentage change = [(577 - 617) / 617] x 100
Subtract the new number by the original number
577 - 617 = -40
-40 ÷ 617 = -0.06482982171799027
-0.06482982171799027 x 100 = -6.48%