137.1% is the change from 345 to 818
Calculation steps:
[( 818 - 345 ) ÷ 345] x 100 = 137.1%
Formula
Percentage change = [(818 - 345) / 345] x 100
Subtract the new number by the original number
818 - 345 = 473
473 ÷ 345 = 1.3710144927536232
1.3710144927536232 x 100 = 137.1%