41.94% is the change from 391 to 555
Calculation steps:
[( 555 - 391 ) ÷ 391] x 100 = 41.94%
Formula
Percentage change = [(555 - 391) / 391] x 100
Subtract the new number by the original number
555 - 391 = 164
164 ÷ 391 = 0.4194373401534527
0.4194373401534527 x 100 = 41.94%