86.46% is the change from 347 to 647
Calculation steps:
[( 647 - 347 ) ÷ 347] x 100 = 86.46%
Formula
Percentage change = [(647 - 347) / 347] x 100
Subtract the new number by the original number
647 - 347 = 300
300 ÷ 347 = 0.8645533141210374
0.8645533141210374 x 100 = 86.46%