56.11% is the change from 221 to 345
Calculation steps:
[( 345 - 221 ) ÷ 221] x 100 = 56.11%
Formula
Percentage change = [(345 - 221) / 221] x 100
Subtract the new number by the original number
345 - 221 = 124
124 ÷ 221 = 0.5610859728506787
0.5610859728506787 x 100 = 56.11%