51.11% is the change from 225 to 340
Calculation steps:
[( 340 - 225 ) ÷ 225] x 100 = 51.11%
Formula
Percentage change = [(340 - 225) / 225] x 100
Subtract the new number by the original number
340 - 225 = 115
115 ÷ 225 = 0.5111111111111111
0.5111111111111111 x 100 = 51.11%