122.58% is the change from 155 to 345
Calculation steps:
[( 345 - 155 ) ÷ 155] x 100 = 122.58%
Formula
Percentage change = [(345 - 155) / 155] x 100
Subtract the new number by the original number
345 - 155 = 190
190 ÷ 155 = 1.2258064516129032
1.2258064516129032 x 100 = 122.58%