99.56% is the change from 228 to 455
Calculation steps:
[( 455 - 228 ) ÷ 228] x 100 = 99.56%
Formula
Percentage change = [(455 - 228) / 228] x 100
Subtract the new number by the original number
455 - 228 = 227
227 ÷ 228 = 0.9956140350877193
0.9956140350877193 x 100 = 99.56%