64.47% is the change from 394 to 648
Calculation steps:
[( 648 - 394 ) ÷ 394] x 100 = 64.47%
Formula
Percentage change = [(648 - 394) / 394] x 100
Subtract the new number by the original number
648 - 394 = 254
254 ÷ 394 = 0.6446700507614214
0.6446700507614214 x 100 = 64.47%