83.24% is the change from 340 to 623
Calculation steps:
[( 623 - 340 ) ÷ 340] x 100 = 83.24%
Formula
Percentage change = [(623 - 340) / 340] x 100
Subtract the new number by the original number
623 - 340 = 283
283 ÷ 340 = 0.8323529411764706
0.8323529411764706 x 100 = 83.24%