-63.48% is the change from 879 to 321
Calculation steps:
[( 321 - 879 ) ÷ 879] x 100 = -63.48%
Formula
Percentage change = [(321 - 879) / 879] x 100
Subtract the new number by the original number
321 - 879 = -558
-558 ÷ 879 = -0.6348122866894198
-0.6348122866894198 x 100 = -63.48%