93.4% is the change from 424 to 820
Calculation steps:
[( 820 - 424 ) ÷ 424] x 100 = 93.4%
Formula
Percentage change = [(820 - 424) / 424] x 100
Subtract the new number by the original number
820 - 424 = 396
396 ÷ 424 = 0.9339622641509434
0.9339622641509434 x 100 = 93.4%