77.35% is the change from 340 to 603
Calculation steps:
[( 603 - 340 ) ÷ 340] x 100 = 77.35%
Formula
Percentage change = [(603 - 340) / 340] x 100
Subtract the new number by the original number
603 - 340 = 263
263 ÷ 340 = 0.7735294117647059
0.7735294117647059 x 100 = 77.35%