-11.71% is the change from 666 to 588
Calculation steps:
[( 588 - 666 ) ÷ 666] x 100 = -11.71%
Formula
Percentage change = [(588 - 666) / 666] x 100
Subtract the new number by the original number
588 - 666 = -78
-78 ÷ 666 = -0.11711711711711711
-0.11711711711711711 x 100 = -11.71%