225.56% is the change from 266 to 866
Calculation steps:
[( 866 - 266 ) ÷ 266] x 100 = 225.56%
Formula
Percentage change = [(866 - 266) / 266] x 100
Subtract the new number by the original number
866 - 266 = 600
600 ÷ 266 = 2.255639097744361
2.255639097744361 x 100 = 225.56%