81.84% is the change from 424 to 771
Calculation steps:
[( 771 - 424 ) ÷ 424] x 100 = 81.84%
Formula
Percentage change = [(771 - 424) / 424] x 100
Subtract the new number by the original number
771 - 424 = 347
347 ÷ 424 = 0.8183962264150944
0.8183962264150944 x 100 = 81.84%