-98.9% is the change from 997 to 11
Calculation steps:
[( 11 - 997 ) ÷ 997] x 100 = -98.9%
Formula
Percentage change = [(11 - 997) / 997] x 100
Subtract the new number by the original number
11 - 997 = -986
-986 ÷ 997 = -0.9889669007021064
-0.9889669007021064 x 100 = -98.9%