94.52% is the change from 420 to 817
Calculation steps:
[( 817 - 420 ) ÷ 420] x 100 = 94.52%
Formula
Percentage change = [(817 - 420) / 420] x 100
Subtract the new number by the original number
817 - 420 = 397
397 ÷ 420 = 0.9452380952380952
0.9452380952380952 x 100 = 94.52%