153.27% is the change from 321 to 813
Calculation steps:
[( 813 - 321 ) ÷ 321] x 100 = 153.27%
Formula
Percentage change = [(813 - 321) / 321] x 100
Subtract the new number by the original number
813 - 321 = 492
492 ÷ 321 = 1.5327102803738317
1.5327102803738317 x 100 = 153.27%