Generate numbers that between 80% and 120% of fraction data

[jimihop]

I have a database that has monthly results for several different entities that are fractions (.55.56%). I want to generate some additional monthly results that are say between 80% and 120% of the existing numbers. I have 3 months of data and I want to expand it so I have 12 months to make the DB larger so I can use it as an example. I tried using Rand and RandBetween but I'm not getting what I want. I'm sure I am making some obvious mistake.

Thanks,

Jim

 

[MarcelBeug]

Suppose you want 80%-120% from .55% you need to multiply to whole numbers and divide the result, like

=ROUND(RANDBETWEEN(8000*.55%,12000*.55%)/10000,4)

 

[Rick Rothstein]

I have a database that has monthly results for several different entities that are fractions (.55.56%). I want to generate some additional monthly results that are say between 80% and 120% of the existing numbers. I have 3 months of data and I want to expand it so I have 12 months to make the DB larger so I can use it as an example. I tried using Rand and RandBetween but I'm not getting what I want. I'm sure I am making some obvious mistake.

It would have helped if you gave some starting numbers and possible results so we could see how you wanted the fractions handled. Anyway, here is my guess at what you want (your fractional percent is assumed to be in cell A1)...

=10*A1*RANDBETWEEN(8,12)