-82.12% is the change from 839 to 150
Calculation steps:
[( 150 - 839 ) ÷ 839] x 100 = -82.12%
Formula
Percentage change = [(150 - 839) / 839] x 100
Subtract the new number by the original number
150 - 839 = -689
-689 ÷ 839 = -0.8212157330154947
-0.8212157330154947 x 100 = -82.12%