47.1% is the change from 155 to 228
Calculation steps:
[( 228 - 155 ) ÷ 155] x 100 = 47.1%
Formula
Percentage change = [(228 - 155) / 155] x 100
Subtract the new number by the original number
228 - 155 = 73
73 ÷ 155 = 0.47096774193548385
0.47096774193548385 x 100 = 47.1%