The length of the other ribbon is
meters.
<h3>Further Explanation</h3>
Let's say that:
First ribbon = x
Second ribbon = y
<u>Given:</u>
From the above we get the information:
x =
meters
x + y = 13 meters
<u>Question:</u>
What is the length of the other ribbon?
First step we need to change the mixed fraction into improper fraction as follow:

so 

so the length of the other ribbon is 
For subtraction or additional fraction, when the denominators is different, we need to find the common denominator for both number.
<h3>Learn more</h3>
Part to whole relationship brainly.com/question/11677654
Subtraction fraction brainly.com/question/2954545
Mixed fraction brainly.com/question/745462
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Keywords: additional fraction, subtraction fraction, mixed fraction, improper fraction