-30.91% is the change from 964 to 666
Calculation steps:
[( 666 - 964 ) ÷ 964] x 100 = -30.91%
Formula
Percentage change = [(666 - 964) / 964] x 100
Subtract the new number by the original number
666 - 964 = -298
-298 ÷ 964 = -0.3091286307053942
-0.3091286307053942 x 100 = -30.91%