95.48% is the change from 420 to 821
Calculation steps:
[( 821 - 420 ) ÷ 420] x 100 = 95.48%
Formula
Percentage change = [(821 - 420) / 420] x 100
Subtract the new number by the original number
821 - 420 = 401
401 ÷ 420 = 0.9547619047619048
0.9547619047619048 x 100 = 95.48%