-1.21% is the change from 824 to 814
Calculation steps:
[( 814 - 824 ) ÷ 824] x 100 = -1.21%
Formula
Percentage change = [(814 - 824) / 824] x 100
Subtract the new number by the original number
814 - 824 = -10
-10 ÷ 824 = -0.012135922330097087
-0.012135922330097087 x 100 = -1.21%