-20.33% is the change from 487 to 388
Calculation steps:
[( 388 - 487 ) ÷ 487] x 100 = -20.33%
Formula
Percentage change = [(388 - 487) / 487] x 100
Subtract the new number by the original number
388 - 487 = -99
-99 ÷ 487 = -0.2032854209445585
-0.2032854209445585 x 100 = -20.33%