99.42% is the change from 343 to 684
Calculation steps:
[( 684 - 343 ) ÷ 343] x 100 = 99.42%
Formula
Percentage change = [(684 - 343) / 343] x 100
Subtract the new number by the original number
684 - 343 = 341
341 ÷ 343 = 0.9941690962099126
0.9941690962099126 x 100 = 99.42%