93.63% is the change from 424 to 821
Calculation steps:
[( 821 - 424 ) ÷ 424] x 100 = 93.63%
Formula
Percentage change = [(821 - 424) / 424] x 100
Subtract the new number by the original number
821 - 424 = 397
397 ÷ 424 = 0.9363207547169812
0.9363207547169812 x 100 = 93.63%