-1.3% is the change from 617 to 609
Calculation steps:
[( 609 - 617 ) ÷ 617] x 100 = -1.3%
Formula
Percentage change = [(609 - 617) / 617] x 100
Subtract the new number by the original number
609 - 617 = -8
-8 ÷ 617 = -0.012965964343598054
-0.012965964343598054 x 100 = -1.3%