-99.4% is the change from 997 to 6
Calculation steps:
[( 6 - 997 ) ÷ 997] x 100 = -99.4%
Formula
Percentage change = [(6 - 997) / 997] x 100
Subtract the new number by the original number
6 - 997 = -991
-991 ÷ 997 = -0.9939819458375125
-0.9939819458375125 x 100 = -99.4%