68.22% is the change from 321 to 540
Calculation steps:
[( 540 - 321 ) ÷ 321] x 100 = 68.22%
Formula
Percentage change = [(540 - 321) / 321] x 100
Subtract the new number by the original number
540 - 321 = 219
219 ÷ 321 = 0.6822429906542056
0.6822429906542056 x 100 = 68.22%