-27.37% is the change from 917 to 666
Calculation steps:
[( 666 - 917 ) ÷ 917] x 100 = -27.37%
Formula
Percentage change = [(666 - 917) / 917] x 100
Subtract the new number by the original number
666 - 917 = -251
-251 ÷ 917 = -0.2737186477644493
-0.2737186477644493 x 100 = -27.37%