-7.96% is the change from 879 to 809
Calculation steps:
[( 809 - 879 ) ÷ 879] x 100 = -7.96%
Formula
Percentage change = [(809 - 879) / 879] x 100
Subtract the new number by the original number
809 - 879 = -70
-70 ÷ 879 = -0.07963594994311718
-0.07963594994311718 x 100 = -7.96%