-9.24% is the change from 671 to 609
Calculation steps:
[( 609 - 671 ) ÷ 671] x 100 = -9.24%
Formula
Percentage change = [(609 - 671) / 671] x 100
Subtract the new number by the original number
609 - 671 = -62
-62 ÷ 671 = -0.09239940387481371
-0.09239940387481371 x 100 = -9.24%