-0.24% is the change from 844 to 842
Calculation steps:
[( 842 - 844 ) ÷ 844] x 100 = -0.24%
Formula
Percentage change = [(842 - 844) / 844] x 100
Subtract the new number by the original number
842 - 844 = -2
-2 ÷ 844 = -0.002369668246445498
-0.002369668246445498 x 100 = -0.24%