-65.91% is the change from 487 to 166
Calculation steps:
[( 166 - 487 ) ÷ 487] x 100 = -65.91%
Formula
Percentage change = [(166 - 487) / 487] x 100
Subtract the new number by the original number
166 - 487 = -321
-321 ÷ 487 = -0.6591375770020534
-0.6591375770020534 x 100 = -65.91%