21.71% is the change from 456 to 555
Calculation steps:
[( 555 - 456 ) ÷ 456] x 100 = 21.71%
Formula
Percentage change = [(555 - 456) / 456] x 100
Subtract the new number by the original number
555 - 456 = 99
99 ÷ 456 = 0.21710526315789475
0.21710526315789475 x 100 = 21.71%