How do you evaluate \frac { 20} { 13} - 5?

2 Answers
Sep 2, 2017

-45/13

Explanation:

To do the subtraction, we need to change 5 into a fraction with a denominator of 13.

13*5 = 65 -> 65/13 =5

Now the problem looks like this:

20/13 - 65/13 = -45/13

Sep 3, 2017

-3 6/13

Explanation:

We can work with mixed numbers.

20/13 = 1 7/13

Now we have: 1 7/13 -5

Write 5 as a mixed fraction as well: 5 = 4 13/13

1 7/13 - 4 13/13" "larr subtract the whole numbers, then the fractions

= 1-4 and (7-13)/13

=-3 and -6/13

-3 6/13