100% is the change from 403 to 806
Calculation steps:
[( 806 - 403 ) ÷ 403] x 100 = 100%
Formula
Percentage change = [(806 - 403) / 403] x 100
Subtract the new number by the original number
806 - 403 = 403
403 ÷ 403 = 1
1 x 100 = 100%
Example