-24.85% is the change from 515 to 387
Calculation steps:
[( 387 - 515 ) ÷ 515] x 100 = -24.85%
Formula
Percentage change = [(387 - 515) / 515] x 100
Subtract the new number by the original number
387 - 515 = -128
-128 ÷ 515 = -0.24854368932038834
-0.24854368932038834 x 100 = -24.85%