307.77% is the change from 103 to 420
Calculation steps:
[( 420 - 103 ) ÷ 103] x 100 = 307.77%
Formula
Percentage change = [(420 - 103) / 103] x 100
Subtract the new number by the original number
420 - 103 = 317
317 ÷ 103 = 3.0776699029126213
3.0776699029126213 x 100 = 307.77%