83.86% is the change from 347 to 638
Calculation steps:
[( 638 - 347 ) ÷ 347] x 100 = 83.86%
Formula
Percentage change = [(638 - 347) / 347] x 100
Subtract the new number by the original number
638 - 347 = 291
291 ÷ 347 = 0.8386167146974063
0.8386167146974063 x 100 = 83.86%