91.31% is the change from 426 to 815
Calculation steps:
[( 815 - 426 ) ÷ 426] x 100 = 91.31%
Formula
Percentage change = [(815 - 426) / 426] x 100
Subtract the new number by the original number
815 - 426 = 389
389 ÷ 426 = 0.9131455399061033
0.9131455399061033 x 100 = 91.31%