-3.44% is the change from 872 to 842
Calculation steps:
[( 842 - 872 ) ÷ 872] x 100 = -3.44%
Formula
Percentage change = [(842 - 872) / 872] x 100
Subtract the new number by the original number
842 - 872 = -30
-30 ÷ 872 = -0.034403669724770644
-0.034403669724770644 x 100 = -3.44%