-10.91% is the change from 660 to 588
Calculation steps:
[( 588 - 660 ) ÷ 660] x 100 = -10.91%
Formula
Percentage change = [(588 - 660) / 660] x 100
Subtract the new number by the original number
588 - 660 = -72
-72 ÷ 660 = -0.10909090909090909
-0.10909090909090909 x 100 = -10.91%