-27.15% is the change from 906 to 660
Calculation steps:
[( 660 - 906 ) ÷ 906] x 100 = -27.15%
Formula
Percentage change = [(660 - 906) / 906] x 100
Subtract the new number by the original number
660 - 906 = -246
-246 ÷ 906 = -0.271523178807947
-0.271523178807947 x 100 = -27.15%