-13.28% is the change from 670 to 581
Calculation steps:
[( 581 - 670 ) ÷ 670] x 100 = -13.28%
Formula
Percentage change = [(581 - 670) / 670] x 100
Subtract the new number by the original number
581 - 670 = -89
-89 ÷ 670 = -0.1328358208955224
-0.1328358208955224 x 100 = -13.28%