-31.48% is the change from 972 to 666
Calculation steps:
[( 666 - 972 ) ÷ 972] x 100 = -31.48%
Formula
Percentage change = [(666 - 972) / 972] x 100
Subtract the new number by the original number
666 - 972 = -306
-306 ÷ 972 = -0.3148148148148148
-0.3148148148148148 x 100 = -31.48%