15.5% is the change from 555 to 641
Calculation steps:
[( 641 - 555 ) ÷ 555] x 100 = 15.5%
Formula
Percentage change = [(641 - 555) / 555] x 100
Subtract the new number by the original number
641 - 555 = 86
86 ÷ 555 = 0.15495495495495495
0.15495495495495495 x 100 = 15.5%