123.48% is the change from 345 to 771
Calculation steps:
[( 771 - 345 ) ÷ 345] x 100 = 123.48%
Formula
Percentage change = [(771 - 345) / 345] x 100
Subtract the new number by the original number
771 - 345 = 426
426 ÷ 345 = 1.2347826086956522
1.2347826086956522 x 100 = 123.48%