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lvalero · 05-19-2016, 11:50 AM

You might as well use this formula that seems simpler to remember.

Multiplication divided by sum

A*B/(A+B)

In the example: (-0.2 * -0.3) / (-0.2 + -0.3) = 0.06/-0.5 = -0.12 = -12%

If the sum is equals or greater than -1 then new formula is worse than the older one!

For example, with the original formula if you compound -80% and -80% the result is -64%. But with the new formula (inverse of the sume of inverses) the result is -40%!

05-19-2016, 11:50 AM	#14
lvalero Join Date: Jan 2015 Location: Madrid, Spain	Re: Using "Either/Or" limitations You might as well use this formula that seems simpler to remember. Multiplication divided by sum AB/(A+B) In the example: (-0.2 -0.3) / (-0.2 + -0.3) = 0.06/-0.5 = -0.12 = -12% If the sum is equals or greater than -1 then new formula is worse than the older one! For example, with the original formula if you compound -80% and -80% the result is -64%. But with the new formula (inverse of the sume of inverses) the result is -40%! __________________ "Imagination is more important than knowledge" Albert Einstein Last edited by lvalero; 05-19-2016 at 11:56 AM.