77.68% is the change from 345 to 613
Calculation steps:
[( 613 - 345 ) ÷ 345] x 100 = 77.68%
Formula
Percentage change = [(613 - 345) / 345] x 100
Subtract the new number by the original number
613 - 345 = 268
268 ÷ 345 = 0.7768115942028986
0.7768115942028986 x 100 = 77.68%