-30.55% is the change from 959 to 666
Calculation steps:
[( 666 - 959 ) ÷ 959] x 100 = -30.55%
Formula
Percentage change = [(666 - 959) / 959] x 100
Subtract the new number by the original number
666 - 959 = -293
-293 ÷ 959 = -0.30552659019812306
-0.30552659019812306 x 100 = -30.55%