81.32% is the change from 423 to 767
Calculation steps:
[( 767 - 423 ) ÷ 423] x 100 = 81.32%
Formula
Percentage change = [(767 - 423) / 423] x 100
Subtract the new number by the original number
767 - 423 = 344
344 ÷ 423 = 0.8132387706855791
0.8132387706855791 x 100 = 81.32%