-2.91% is the change from 824 to 800
Calculation steps:
[( 800 - 824 ) ÷ 824] x 100 = -2.91%
Formula
Percentage change = [(800 - 824) / 824] x 100
Subtract the new number by the original number
800 - 824 = -24
-24 ÷ 824 = -0.02912621359223301
-0.02912621359223301 x 100 = -2.91%