-99.88% is the change from 829 to 1
Calculation steps:
[( 1 - 829 ) ÷ 829] x 100 = -99.88%
Formula
Percentage change = [(1 - 829) / 829] x 100
Subtract the new number by the original number
1 - 829 = -828
-828 ÷ 829 = -0.9987937273823885
-0.9987937273823885 x 100 = -99.88%