20.88% is the change from 455 to 550
Calculation steps:
[( 550 - 455 ) ÷ 455] x 100 = 20.88%
Formula
Percentage change = [(550 - 455) / 455] x 100
Subtract the new number by the original number
550 - 455 = 95
95 ÷ 455 = 0.2087912087912088
0.2087912087912088 x 100 = 20.88%