50% is the change from 228 to 342
Calculation steps:
[( 342 - 228 ) ÷ 228] x 100 = 50%
Formula
Percentage change = [(342 - 228) / 228] x 100
Subtract the new number by the original number
342 - 228 = 114
114 ÷ 228 = 0.5
0.5 x 100 = 50%
Example