17.45% is the change from 321 to 377
Calculation steps:
[( 377 - 321 ) ÷ 321] x 100 = 17.45%
Formula
Percentage change = [(377 - 321) / 321] x 100
Subtract the new number by the original number
377 - 321 = 56
56 ÷ 321 = 0.17445482866043613
0.17445482866043613 x 100 = 17.45%