2.38% is the change from 800 to 819
Calculation steps:
[( 819 - 800 ) ÷ 800] x 100 = 2.38%
Formula
Percentage change = [(819 - 800) / 800] x 100
Subtract the new number by the original number
819 - 800 = 19
19 ÷ 800 = 0.02375
0.02375 x 100 = 2.38%
Example