40.35% is the change from 228 to 320
Calculation steps:
[( 320 - 228 ) ÷ 228] x 100 = 40.35%
Formula
Percentage change = [(320 - 228) / 228] x 100
Subtract the new number by the original number
320 - 228 = 92
92 ÷ 228 = 0.40350877192982454
0.40350877192982454 x 100 = 40.35%