-8.79% is the change from 671 to 612
Calculation steps:
[( 612 - 671 ) ÷ 671] x 100 = -8.79%
Formula
Percentage change = [(612 - 671) / 671] x 100
Subtract the new number by the original number
612 - 671 = -59
-59 ÷ 671 = -0.08792846497764531
-0.08792846497764531 x 100 = -8.79%