-3.67% is the change from 872 to 840
Calculation steps:
[( 840 - 872 ) ÷ 872] x 100 = -3.67%
Formula
Percentage change = [(840 - 872) / 872] x 100
Subtract the new number by the original number
840 - 872 = -32
-32 ÷ 872 = -0.03669724770642202
-0.03669724770642202 x 100 = -3.67%