79.75% is the change from 321 to 577
Calculation steps:
[( 577 - 321 ) ÷ 321] x 100 = 79.75%
Formula
Percentage change = [(577 - 321) / 321] x 100
Subtract the new number by the original number
577 - 321 = 256
256 ÷ 321 = 0.7975077881619937
0.7975077881619937 x 100 = 79.75%