-66.13% is the change from 617 to 209
Calculation steps:
[( 209 - 617 ) ÷ 617] x 100 = -66.13%
Formula
Percentage change = [(209 - 617) / 617] x 100
Subtract the new number by the original number
209 - 617 = -408
-408 ÷ 617 = -0.6612641815235009
-0.6612641815235009 x 100 = -66.13%