Is the sentence "Yes, I can match this quality no problem" grammatically correct and natural when I want to answer to a person that I can achive the same quality of another person's product.
closed as off-topic by ColleenV♦ Aug 22 '18 at 14:51
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It's perfectly idiomatic but it's not grammatically correct.
The main part of the sentence, which can stand by itself, is:
Yes, I can match this quality.
To clarify that it's easy to do so, people often add:
It's no problem
which is also a grammatical sentence.
However, in idiomatic speech, they tend to omit the it's.
And they insert the expression no problem either in front or at the end of the sentence declaring that they can match the quality.
So it becomes:
No problem, yes, I can match this quality
Yes, I can match this quality; no problem!
If you were using formal speech or writing, you should say: It's no problem although you will commonly hear it shortened to just no problem!