68.27% is the change from 394 to 663
Calculation steps:
[( 663 - 394 ) ÷ 394] x 100 = 68.27%
Formula
Percentage change = [(663 - 394) / 394] x 100
Subtract the new number by the original number
663 - 394 = 269
269 ÷ 394 = 0.682741116751269
0.682741116751269 x 100 = 68.27%