101.2% is the change from 415 to 835
Calculation steps:
[( 835 - 415 ) ÷ 415] x 100 = 101.2%
Formula
Percentage change = [(835 - 415) / 415] x 100
Subtract the new number by the original number
835 - 415 = 420
420 ÷ 415 = 1.0120481927710843
1.0120481927710843 x 100 = 101.2%