-99.88% is the change from 817 to 1
Calculation steps:
[( 1 - 817 ) ÷ 817] x 100 = -99.88%
Formula
Percentage change = [(1 - 817) / 817] x 100
Subtract the new number by the original number
1 - 817 = -816
-816 ÷ 817 = -0.9987760097919217
-0.9987760097919217 x 100 = -99.88%