-9.77% is the change from 266 to 240
Calculation steps:
[( 240 - 266 ) ÷ 266] x 100 = -9.77%
Formula
Percentage change = [(240 - 266) / 266] x 100
Subtract the new number by the original number
240 - 266 = -26
-26 ÷ 266 = -0.09774436090225563
-0.09774436090225563 x 100 = -9.77%