-23.67% is the change from 507 to 387
Calculation steps:
[( 387 - 507 ) ÷ 507] x 100 = -23.67%
Formula
Percentage change = [(387 - 507) / 507] x 100
Subtract the new number by the original number
387 - 507 = -120
-120 ÷ 507 = -0.23668639053254437
-0.23668639053254437 x 100 = -23.67%