153.56% is the change from 323 to 819
Calculation steps:
[( 819 - 323 ) ÷ 323] x 100 = 153.56%
Formula
Percentage change = [(819 - 323) / 323] x 100
Subtract the new number by the original number
819 - 323 = 496
496 ÷ 323 = 1.5356037151702786
1.5356037151702786 x 100 = 153.56%