3% is the change from 800 to 824
Calculation steps:
[( 824 - 800 ) ÷ 800] x 100 = 3%
Formula
Percentage change = [(824 - 800) / 800] x 100
Subtract the new number by the original number
824 - 800 = 24
24 ÷ 800 = 0.03
0.03 x 100 = 3%
Example