470% is the change from 40 to 228
Calculation steps:
[( 228 - 40 ) ÷ 40] x 100 = 470%
Formula
Percentage change = [(228 - 40) / 40] x 100
Subtract the new number by the original number
228 - 40 = 188
188 ÷ 40 = 4.7
4.7 x 100 = 470%
Example