-17.36% is the change from 979 to 809
Calculation steps:
[( 809 - 979 ) ÷ 979] x 100 = -17.36%
Formula
Percentage change = [(809 - 979) / 979] x 100
Subtract the new number by the original number
809 - 979 = -170
-170 ÷ 979 = -0.17364657814096016
-0.17364657814096016 x 100 = -17.36%