-95.69% is the change from 487 to 21
Calculation steps:
[( 21 - 487 ) ÷ 487] x 100 = -95.69%
Formula
Percentage change = [(21 - 487) / 487] x 100
Subtract the new number by the original number
21 - 487 = -466
-466 ÷ 487 = -0.9568788501026694
-0.9568788501026694 x 100 = -95.69%