-26.49% is the change from 906 to 666
Calculation steps:
[( 666 - 906 ) ÷ 906] x 100 = -26.49%
Formula
Percentage change = [(666 - 906) / 906] x 100
Subtract the new number by the original number
666 - 906 = -240
-240 ÷ 906 = -0.26490066225165565
-0.26490066225165565 x 100 = -26.49%