81.25% is the change from 448 to 812
Calculation steps:
[( 812 - 448 ) ÷ 448] x 100 = 81.25%
Formula
Percentage change = [(812 - 448) / 448] x 100
Subtract the new number by the original number
812 - 448 = 364
364 ÷ 448 = 0.8125
0.8125 x 100 = 81.25%