-38.57% is the change from 879 to 540
Calculation steps:
[( 540 - 879 ) ÷ 879] x 100 = -38.57%
Formula
Percentage change = [(540 - 879) / 879] x 100
Subtract the new number by the original number
540 - 879 = -339
-339 ÷ 879 = -0.3856655290102389
-0.3856655290102389 x 100 = -38.57%