-30.33% is the change from 956 to 666
Calculation steps:
[( 666 - 956 ) ÷ 956] x 100 = -30.33%
Formula
Percentage change = [(666 - 956) / 956] x 100
Subtract the new number by the original number
666 - 956 = -290
-290 ÷ 956 = -0.303347280334728
-0.303347280334728 x 100 = -30.33%