90.29% is the change from 340 to 647
Calculation steps:
[( 647 - 340 ) ÷ 340] x 100 = 90.29%
Formula
Percentage change = [(647 - 340) / 340] x 100
Subtract the new number by the original number
647 - 340 = 307
307 ÷ 340 = 0.9029411764705882
0.9029411764705882 x 100 = 90.29%