Originally Posted by Bozo
This is driving me nuts. I have figured it out before and then forgot how.
Some amount, less 30% of that amount = $8
What is the amount, and how in the heck can I figure it for myself.
If I get an answer, I'm carving it on the back of my hand this time.
No need to mutilate your hand!
30% is just 30/100, which is 0.3 .
So you can set it up as an algebra equation...
Let's call "some amount" as "x".
So, "some amount, less 30% of that amount = $8" becomes
x - 0.3 x = 8
Rearranging it becomes
x (1 - 0.3) = 8 ... but since (1 - 0.3) = 0.7, we can write
0.7 x = 8 ... now dividing each side by 0.7 gives us
x = 8 / 0.7 ... or
x = 11.43 (rounding it off).
If you plug 11.43 in the original equation, you see it works out!