65.05% is the change from 392 to 647
Calculation steps:
[( 647 - 392 ) ÷ 392] x 100 = 65.05%
Formula
Percentage change = [(647 - 392) / 392] x 100
Subtract the new number by the original number
647 - 392 = 255
255 ÷ 392 = 0.6505102040816326
0.6505102040816326 x 100 = 65.05%