17.76% is the change from 321 to 378
Calculation steps:
[( 378 - 321 ) ÷ 321] x 100 = 17.76%
Formula
Percentage change = [(378 - 321) / 321] x 100
Subtract the new number by the original number
378 - 321 = 57
57 ÷ 321 = 0.17757009345794392
0.17757009345794392 x 100 = 17.76%