-55% is the change from 860 to 387
Calculation steps:
[( 387 - 860 ) ÷ 860] x 100 = -55%
Formula
Percentage change = [(387 - 860) / 860] x 100
Subtract the new number by the original number
387 - 860 = -473
-473 ÷ 860 = -0.55
-0.55 x 100 = -55%
Example