-37.07% is the change from 615 to 387
Calculation steps:
[( 387 - 615 ) ÷ 615] x 100 = -37.07%
Formula
Percentage change = [(387 - 615) / 615] x 100
Subtract the new number by the original number
387 - 615 = -228
-228 ÷ 615 = -0.37073170731707317
-0.37073170731707317 x 100 = -37.07%