677.78% is the change from 54 to 420
Calculation steps:
[( 420 - 54 ) ÷ 54] x 100 = 677.78%
Formula
Percentage change = [(420 - 54) / 54] x 100
Subtract the new number by the original number
420 - 54 = 366
366 ÷ 54 = 6.777777777777778
6.777777777777778 x 100 = 677.78%