100% is the change from 394 to 788
Calculation steps:
[( 788 - 394 ) ÷ 394] x 100 = 100%
Formula
Percentage change = [(788 - 394) / 394] x 100
Subtract the new number by the original number
788 - 394 = 394
394 ÷ 394 = 1
1 x 100 = 100%
Example