99.71% is the change from 340 to 679
Calculation steps:
[( 679 - 340 ) ÷ 340] x 100 = 99.71%
Formula
Percentage change = [(679 - 340) / 340] x 100
Subtract the new number by the original number
679 - 340 = 339
339 ÷ 340 = 0.9970588235294118
0.9970588235294118 x 100 = 99.71%