-18.48% is the change from 487 to 397
Calculation steps:
[( 397 - 487 ) ÷ 487] x 100 = -18.48%
Formula
Percentage change = [(397 - 487) / 487] x 100
Subtract the new number by the original number
397 - 487 = -90
-90 ÷ 487 = -0.18480492813141683
-0.18480492813141683 x 100 = -18.48%