156.97% is the change from 323 to 830
Calculation steps:
[( 830 - 323 ) ÷ 323] x 100 = 156.97%
Formula
Percentage change = [(830 - 323) / 323] x 100
Subtract the new number by the original number
830 - 323 = 507
507 ÷ 323 = 1.5696594427244581
1.5696594427244581 x 100 = 156.97%