-91.7% is the change from 879 to 73
Calculation steps:
[( 73 - 879 ) ÷ 879] x 100 = -91.7%
Formula
Percentage change = [(73 - 879) / 879] x 100
Subtract the new number by the original number
73 - 879 = -806
-806 ÷ 879 = -0.9169510807736063
-0.9169510807736063 x 100 = -91.7%