82.27% is the change from 423 to 771
Calculation steps:
[( 771 - 423 ) ÷ 423] x 100 = 82.27%
Formula
Percentage change = [(771 - 423) / 423] x 100
Subtract the new number by the original number
771 - 423 = 348
348 ÷ 423 = 0.8226950354609929
0.8226950354609929 x 100 = 82.27%