154.52% is the change from 321 to 817
Calculation steps:
[( 817 - 321 ) ÷ 321] x 100 = 154.52%
Formula
Percentage change = [(817 - 321) / 321] x 100
Subtract the new number by the original number
817 - 321 = 496
496 ÷ 321 = 1.5451713395638629
1.5451713395638629 x 100 = 154.52%