-8.81% is the change from 670 to 611
Calculation steps:
[( 611 - 670 ) ÷ 670] x 100 = -8.81%
Formula
Percentage change = [(611 - 670) / 670] x 100
Subtract the new number by the original number
611 - 670 = -59
-59 ÷ 670 = -0.0880597014925373
-0.0880597014925373 x 100 = -8.81%