-74.59% is the change from 669 to 170
Calculation steps:
[( 170 - 669 ) ÷ 669] x 100 = -74.59%
Formula
Percentage change = [(170 - 669) / 669] x 100
Subtract the new number by the original number
170 - 669 = -499
-499 ÷ 669 = -0.7458893871449925
-0.7458893871449925 x 100 = -74.59%