67.94% is the change from 340 to 571
Calculation steps:
[( 571 - 340 ) ÷ 340] x 100 = 67.94%
Formula
Percentage change = [(571 - 340) / 340] x 100
Subtract the new number by the original number
571 - 340 = 231
231 ÷ 340 = 0.6794117647058824
0.6794117647058824 x 100 = 67.94%