211.54% is the change from 260 to 810
Calculation steps:
[( 810 - 260 ) ÷ 260] x 100 = 211.54%
Formula
Percentage change = [(810 - 260) / 260] x 100
Subtract the new number by the original number
810 - 260 = 550
550 ÷ 260 = 2.1153846153846154
2.1153846153846154 x 100 = 211.54%