1455.56% is the change from 27 to 420
Calculation steps:
[( 420 - 27 ) ÷ 27] x 100 = 1455.56%
Formula
Percentage change = [(420 - 27) / 27] x 100
Subtract the new number by the original number
420 - 27 = 393
393 ÷ 27 = 14.555555555555555
14.555555555555555 x 100 = 1455.56%