108.12% is the change from 394 to 820
Calculation steps:
[( 820 - 394 ) ÷ 394] x 100 = 108.12%
Formula
Percentage change = [(820 - 394) / 394] x 100
Subtract the new number by the original number
820 - 394 = 426
426 ÷ 394 = 1.0812182741116751
1.0812182741116751 x 100 = 108.12%