85.39% is the change from 349 to 647
Calculation steps:
[( 647 - 349 ) ÷ 349] x 100 = 85.39%
Formula
Percentage change = [(647 - 349) / 349] x 100
Subtract the new number by the original number
647 - 349 = 298
298 ÷ 349 = 0.8538681948424068
0.8538681948424068 x 100 = 85.39%