89.1% is the change from 431 to 815
Calculation steps:
[( 815 - 431 ) ÷ 431] x 100 = 89.1%
Formula
Percentage change = [(815 - 431) / 431] x 100
Subtract the new number by the original number
815 - 431 = 384
384 ÷ 431 = 0.8909512761020881
0.8909512761020881 x 100 = 89.1%