82.81% is the change from 448 to 819
Calculation steps:
[( 819 - 448 ) ÷ 448] x 100 = 82.81%
Formula
Percentage change = [(819 - 448) / 448] x 100
Subtract the new number by the original number
819 - 448 = 371
371 ÷ 448 = 0.828125
0.828125 x 100 = 82.81%