220.46% is the change from 259 to 830
Calculation steps:
[( 830 - 259 ) ÷ 259] x 100 = 220.46%
Formula
Percentage change = [(830 - 259) / 259] x 100
Subtract the new number by the original number
830 - 259 = 571
571 ÷ 259 = 2.2046332046332044
2.2046332046332044 x 100 = 220.46%