SOLUTION: Could you please help me with these 2 problem? They are operations on fractons. I have tried this a few timess but keep getting it wrong. My answer was -1/2 but wrong, help ple

Algebra ->  Signed-numbers -> SOLUTION: Could you please help me with these 2 problem? They are operations on fractons. I have tried this a few timess but keep getting it wrong. My answer was -1/2 but wrong, help ple      Log On


   



Question 986636: Could you please help me with these 2 problem?
They are operations on fractons.
I have tried this a few timess but keep getting it wrong. My answer was
-1/2 but wrong, help please?
5/9 divided by (-9/10)= ?
Next question is-
-10/9 divided by (-9/10)=?
my answer was 1, but I got it wrong, help?

Found 2 solutions by stanbon, macston:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
5/9 divided by (-9/10)= ?
(5/9) / (-9/10)
---
= (5/9) * (-10/9)
---
= -50/81
-------------------------
Next question is-
-10/9 divided by (-9/10)=?
---
(-10/9) / (-9/10)
---
= (-10/9)*(-10/9)
---
= 100/81
-------------
Cheers,
Stan H.
------------

Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
The simplest way to divide by a fraction is to multiply by its reciprocal:
.
%285%2F9%29%2F%28-9%2F10%29=%285%2F9%29%28-10%2F9%29=-50%2F81=-0.6172
.
%28-10%2F9%29%2F%28-9%2F10%29=%28-10%2F9%29%28-10%2F9%29=100%2F81=1.2346