-20.53% is the change from 487 to 387
Calculation steps:
[( 387 - 487 ) ÷ 487] x 100 = -20.53%
Formula
Percentage change = [(387 - 487) / 487] x 100
Subtract the new number by the original number
387 - 487 = -100
-100 ÷ 487 = -0.2053388090349076
-0.2053388090349076 x 100 = -20.53%