71.47% is the change from 340 to 583
Calculation steps:
[( 583 - 340 ) ÷ 340] x 100 = 71.47%
Formula
Percentage change = [(583 - 340) / 340] x 100
Subtract the new number by the original number
583 - 340 = 243
243 ÷ 340 = 0.7147058823529412
0.7147058823529412 x 100 = 71.47%