310.89% is the change from 202 to 830
Calculation steps:
[( 830 - 202 ) ÷ 202] x 100 = 310.89%
Formula
Percentage change = [(830 - 202) / 202] x 100
Subtract the new number by the original number
830 - 202 = 628
628 ÷ 202 = 3.108910891089109
3.108910891089109 x 100 = 310.89%