55% is the change from 220 to 341
Calculation steps:
[( 341 - 220 ) ÷ 220] x 100 = 55%
Formula
Percentage change = [(341 - 220) / 220] x 100
Subtract the new number by the original number
341 - 220 = 121
121 ÷ 220 = 0.55
0.55 x 100 = 55%
Example