86.74% is the change from 445 to 831
Calculation steps:
[( 831 - 445 ) ÷ 445] x 100 = 86.74%
Formula
Percentage change = [(831 - 445) / 445] x 100
Subtract the new number by the original number
831 - 445 = 386
386 ÷ 445 = 0.8674157303370786
0.8674157303370786 x 100 = 86.74%