-2.73% is the change from 842 to 819
Calculation steps:
[( 819 - 842 ) ÷ 842] x 100 = -2.73%
Formula
Percentage change = [(819 - 842) / 842] x 100
Subtract the new number by the original number
819 - 842 = -23
-23 ÷ 842 = -0.027315914489311165
-0.027315914489311165 x 100 = -2.73%