197.49% is the change from 279 to 830
Calculation steps:
[( 830 - 279 ) ÷ 279] x 100 = 197.49%
Formula
Percentage change = [(830 - 279) / 279] x 100
Subtract the new number by the original number
830 - 279 = 551
551 ÷ 279 = 1.974910394265233
1.974910394265233 x 100 = 197.49%