-74.36% is the change from 667 to 171
Calculation steps:
[( 171 - 667 ) ÷ 667] x 100 = -74.36%
Formula
Percentage change = [(171 - 667) / 667] x 100
Subtract the new number by the original number
171 - 667 = -496
-496 ÷ 667 = -0.7436281859070465
-0.7436281859070465 x 100 = -74.36%