11.21% is the change from 321 to 357
Calculation steps:
[( 357 - 321 ) ÷ 321] x 100 = 11.21%
Formula
Percentage change = [(357 - 321) / 321] x 100
Subtract the new number by the original number
357 - 321 = 36
36 ÷ 321 = 0.11214953271028037
0.11214953271028037 x 100 = 11.21%