-79.98% is the change from 839 to 168
Calculation steps:
[( 168 - 839 ) ÷ 839] x 100 = -79.98%
Formula
Percentage change = [(168 - 839) / 839] x 100
Subtract the new number by the original number
168 - 839 = -671
-671 ÷ 839 = -0.799761620977354
-0.799761620977354 x 100 = -79.98%