54.5% is the change from 222 to 343
Calculation steps:
[( 343 - 222 ) ÷ 222] x 100 = 54.5%
Formula
Percentage change = [(343 - 222) / 222] x 100
Subtract the new number by the original number
343 - 222 = 121
121 ÷ 222 = 0.545045045045045
0.545045045045045 x 100 = 54.5%