-5.15% is the change from 408 to 387
Calculation steps:
[( 387 - 408 ) ÷ 408] x 100 = -5.15%
Formula
Percentage change = [(387 - 408) / 408] x 100
Subtract the new number by the original number
387 - 408 = -21
-21 ÷ 408 = -0.051470588235294115
-0.051470588235294115 x 100 = -5.15%