-98.8% is the change from 834 to 10
Calculation steps:
[( 10 - 834 ) ÷ 834] x 100 = -98.8%
Formula
Percentage change = [(10 - 834) / 834] x 100
Subtract the new number by the original number
10 - 834 = -824
-824 ÷ 834 = -0.988009592326139
-0.988009592326139 x 100 = -98.8%