231.8% is the change from 261 to 866
Calculation steps:
[( 866 - 261 ) ÷ 261] x 100 = 231.8%
Formula
Percentage change = [(866 - 261) / 261] x 100
Subtract the new number by the original number
866 - 261 = 605
605 ÷ 261 = 2.318007662835249
2.318007662835249 x 100 = 231.8%