209.7% is the change from 268 to 830
Calculation steps:
[( 830 - 268 ) ÷ 268] x 100 = 209.7%
Formula
Percentage change = [(830 - 268) / 268] x 100
Subtract the new number by the original number
830 - 268 = 562
562 ÷ 268 = 2.0970149253731343
2.0970149253731343 x 100 = 209.7%