-99.88% is the change from 838 to 1
Calculation steps:
[( 1 - 838 ) ÷ 838] x 100 = -99.88%
Formula
Percentage change = [(1 - 838) / 838] x 100
Subtract the new number by the original number
1 - 838 = -837
-837 ÷ 838 = -0.9988066825775657
-0.9988066825775657 x 100 = -99.88%