85.1% is the change from 349 to 646
Calculation steps:
[( 646 - 349 ) ÷ 349] x 100 = 85.1%
Formula
Percentage change = [(646 - 349) / 349] x 100
Subtract the new number by the original number
646 - 349 = 297
297 ÷ 349 = 0.8510028653295129
0.8510028653295129 x 100 = 85.1%
Example