180.49% is the change from 123 to 345
Calculation steps:
[( 345 - 123 ) ÷ 123] x 100 = 180.49%
Formula
Percentage change = [(345 - 123) / 123] x 100
Subtract the new number by the original number
345 - 123 = 222
222 ÷ 123 = 1.8048780487804879
1.8048780487804879 x 100 = 180.49%