-9.54% is the change from 671 to 607
Calculation steps:
[( 607 - 671 ) ÷ 671] x 100 = -9.54%
Formula
Percentage change = [(607 - 671) / 671] x 100
Subtract the new number by the original number
607 - 671 = -64
-64 ÷ 671 = -0.09538002980625931
-0.09538002980625931 x 100 = -9.54%