-82.72% is the change from 839 to 145
Calculation steps:
[( 145 - 839 ) ÷ 839] x 100 = -82.72%
Formula
Percentage change = [(145 - 839) / 839] x 100
Subtract the new number by the original number
145 - 839 = -694
-694 ÷ 839 = -0.8271752085816448
-0.8271752085816448 x 100 = -82.72%