-13.88% is the change from 670 to 577
Calculation steps:
[( 577 - 670 ) ÷ 670] x 100 = -13.88%
Formula
Percentage change = [(577 - 670) / 670] x 100
Subtract the new number by the original number
577 - 670 = -93
-93 ÷ 670 = -0.13880597014925372
-0.13880597014925372 x 100 = -13.88%