71.49% is the change from 228 to 391
Calculation steps:
[( 391 - 228 ) ÷ 228] x 100 = 71.49%
Formula
Percentage change = [(391 - 228) / 228] x 100
Subtract the new number by the original number
391 - 228 = 163
163 ÷ 228 = 0.7149122807017544
0.7149122807017544 x 100 = 71.49%