16400% is the change from 6 to 990
Calculation steps:
[( 990 - 6 ) ÷ 6] x 100 = 16400%
Formula
Percentage change = [(990 - 6) / 6] x 100
Subtract the new number by the original number
990 - 6 = 984
984 ÷ 6 = 164
164 x 100 = 16400%
Example