-83.5% is the change from 879 to 145
Calculation steps:
[( 145 - 879 ) ÷ 879] x 100 = -83.5%
Formula
Percentage change = [(145 - 879) / 879] x 100
Subtract the new number by the original number
145 - 879 = -734
-734 ÷ 879 = -0.8350398179749715
-0.8350398179749715 x 100 = -83.5%