139.18% is the change from 342 to 818
Calculation steps:
[( 818 - 342 ) ÷ 342] x 100 = 139.18%
Formula
Percentage change = [(818 - 342) / 342] x 100
Subtract the new number by the original number
818 - 342 = 476
476 ÷ 342 = 1.391812865497076
1.391812865497076 x 100 = 139.18%