21.28% is the change from 188 to 228
Calculation steps:
[( 228 - 188 ) ÷ 188] x 100 = 21.28%
Formula
Percentage change = [(228 - 188) / 188] x 100
Subtract the new number by the original number
228 - 188 = 40
40 ÷ 188 = 0.2127659574468085
0.2127659574468085 x 100 = 21.28%