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-8/-2/5

 Oct 5, 2016
 #1
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Both of these numbers are negative, so for the sake of ease, let's multiply both by -1 to make the equation 8 / 2/5.

 

First, let's make 8 into a fraction.

 

8/1 / 2/5

 

Now, use "keep, change, flip."

 

Keep 8/1...

 

Change the division sign into a multiplication sign...

 

8/1 * 2/5

 

And flip 2/5 into 5/2 (the reciprocal).

 

Now we have 8/1 * 5/2.

 

What we'll do is multiply the numerators together to find the solution's numerator and the denominators to find the solution's denominator.

 

8*5 = 40

 

1*2 = 2

 

We get 40/2. This can be simplified into 20/1, or just plain 20.

 

In conclusion,  -8 / -2/5 = 20.

 Oct 5, 2016

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