81.62% is the change from 321 to 583
Calculation steps:
[( 583 - 321 ) ÷ 321] x 100 = 81.62%
Formula
Percentage change = [(583 - 321) / 321] x 100
Subtract the new number by the original number
583 - 321 = 262
262 ÷ 321 = 0.8161993769470405
0.8161993769470405 x 100 = 81.62%