-74.96% is the change from 679 to 170
Calculation steps:
[( 170 - 679 ) ÷ 679] x 100 = -74.96%
Formula
Percentage change = [(170 - 679) / 679] x 100
Subtract the new number by the original number
170 - 679 = -509
-509 ÷ 679 = -0.7496318114874816
-0.7496318114874816 x 100 = -74.96%