99.06% is the change from 424 to 844
Calculation steps:
[( 844 - 424 ) ÷ 424] x 100 = 99.06%
Formula
Percentage change = [(844 - 424) / 424] x 100
Subtract the new number by the original number
844 - 424 = 420
420 ÷ 424 = 0.9905660377358491
0.9905660377358491 x 100 = 99.06%