-98.8% is the change from 833 to 10
Calculation steps:
[( 10 - 833 ) ÷ 833] x 100 = -98.8%
Formula
Percentage change = [(10 - 833) / 833] x 100
Subtract the new number by the original number
10 - 833 = -823
-823 ÷ 833 = -0.9879951980792316
-0.9879951980792316 x 100 = -98.8%