-20.34% is the change from 870 to 693
Calculation steps:
[( 693 - 870 ) ÷ 870] x 100 = -20.34%
Formula
Percentage change = [(693 - 870) / 870] x 100
Subtract the new number by the original number
693 - 870 = -177
-177 ÷ 870 = -0.20344827586206896
-0.20344827586206896 x 100 = -20.34%