-15.6% is the change from 840 to 709
Calculation steps:
[( 709 - 840 ) ÷ 840] x 100 = -15.6%
Formula
Percentage change = [(709 - 840) / 840] x 100
Subtract the new number by the original number
709 - 840 = -131
-131 ÷ 840 = -0.15595238095238095
-0.15595238095238095 x 100 = -15.6%