100% is the change from 419 to 838
Calculation steps:
[( 838 - 419 ) ÷ 419] x 100 = 100%
Formula
Percentage change = [(838 - 419) / 419] x 100
Subtract the new number by the original number
838 - 419 = 419
419 ÷ 419 = 1
1 x 100 = 100%
Example