It is asking you to add seven-eighths and five-eighths.
Let's practise
+ 
=
- Read the question and then read it again. What is it asking you to do?
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- The denominator is the same for both fractions so you can add the numerators.
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+ = 
- The answer is an improper fraction and so can be made into a mixed number.
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= 1
- What is your answer? Can your fraction be simplified?
Check your working.
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1 = 1
The answer is 1
You can use the inverse to check that 1 – = , or 1 – = .