912.2% is the change from 82 to 830
Calculation steps:
[( 830 - 82 ) ÷ 82] x 100 = 912.2%
Formula
Percentage change = [(830 - 82) / 82] x 100
Subtract the new number by the original number
830 - 82 = 748
748 ÷ 82 = 9.121951219512194
9.121951219512194 x 100 = 912.2%