-82.64% is the change from 979 to 170
Calculation steps:
[( 170 - 979 ) ÷ 979] x 100 = -82.64%
Formula
Percentage change = [(170 - 979) / 979] x 100
Subtract the new number by the original number
170 - 979 = -809
-809 ÷ 979 = -0.8263534218590398
-0.8263534218590398 x 100 = -82.64%