I am not understing how my teacher came up with the answer 1/36 out of 1/9-1/4. I get 5/36

Question

amistre64 · Answer

how did you arrive at your conclusion?

amistre64 · Answer

$$\frac{1}{9}-\frac14=n$$
$$\frac{1(9)}{9}-\frac{1(9)}{4}=(9)n$$
$$1-\frac{9}{4}=9n$$
$$1(4)-\frac{9(4)}{4}=9(4)n$$
$$4-9=36n$$
$$-5=36n$$
$$\frac{-5}{36}=n$$

anonymous · Answer

(1/9)*(1/4)=1/36

anonymous · Answer

I changed the LCD on both to 26 times them by the lcd and minused them?
1/9 =4/36 and 1/4=9/36

amistre64 · Answer

i never bother trying to determine the commons; i let the math do it for me

anonymous · Answer

Ok, I got it turns in to a multilpy problem - Thank you everyone!

amistre64 · Answer

did you mistype the original then?

amistre64 · Answer

1/9-1/4 does not "turn into a multiply problem".  If you typed up the wrong problem, then yes; any number of outcomes might satisify ....

stormfire1 · Answer

@amistre64: How did you the fractions bars in there?  I've been trying to figure that out...

amistre64 · Answer

the latex coding is:

\frac{top}{bottom}

amistre64 · Answer

but you have to wrap it in delimiters

stormfire1 · Answer

I see..cool, thx :)

amistre64 · Answer

|dw:1317570929702:dw|