-20.91% is the change from 617 to 488
Calculation steps:
[( 488 - 617 ) ÷ 617] x 100 = -20.91%
Formula
Percentage change = [(488 - 617) / 617] x 100
Subtract the new number by the original number
488 - 617 = -129
-129 ÷ 617 = -0.20907617504051865
-0.20907617504051865 x 100 = -20.91%