723.53% is the change from 51 to 420
Calculation steps:
[( 420 - 51 ) ÷ 51] x 100 = 723.53%
Formula
Percentage change = [(420 - 51) / 51] x 100
Subtract the new number by the original number
420 - 51 = 369
369 ÷ 51 = 7.235294117647059
7.235294117647059 x 100 = 723.53%