100% is the change from 427 to 854
Calculation steps:
[( 854 - 427 ) ÷ 427] x 100 = 100%
Formula
Percentage change = [(854 - 427) / 427] x 100
Subtract the new number by the original number
854 - 427 = 427
427 ÷ 427 = 1
1 x 100 = 100%
Example