218.01% is the change from 261 to 830
Calculation steps:
[( 830 - 261 ) ÷ 261] x 100 = 218.01%
Formula
Percentage change = [(830 - 261) / 261] x 100
Subtract the new number by the original number
830 - 261 = 569
569 ÷ 261 = 2.1800766283524906
2.1800766283524906 x 100 = 218.01%