2110.53% is the change from 19 to 420
Calculation steps:
[( 420 - 19 ) ÷ 19] x 100 = 2110.53%
Formula
Percentage change = [(420 - 19) / 19] x 100
Subtract the new number by the original number
420 - 19 = 401
401 ÷ 19 = 21.105263157894736
21.105263157894736 x 100 = 2110.53%