-20.37% is the change from 486 to 387
Calculation steps:
[( 387 - 486 ) ÷ 486] x 100 = -20.37%
Formula
Percentage change = [(387 - 486) / 486] x 100
Subtract the new number by the original number
387 - 486 = -99
-99 ÷ 486 = -0.2037037037037037
-0.2037037037037037 x 100 = -20.37%