Try and be as exact as possible! 
I need to remember some dates first...
THEN (this is the maths nerd coming out in me) count the days from when you first met... (again, as exact as you can
)
Now divide the smaller number by the bigger number, multiply by 100 and that's the % of time you've actually spent with your SO since you met!

I need to remember some dates first...

THEN (this is the maths nerd coming out in me) count the days from when you first met... (again, as exact as you can

Now divide the smaller number by the bigger number, multiply by 100 and that's the % of time you've actually spent with your SO since you met!
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