answering your question or in answering
Informally , when writing a letter in respond to another one , what do you most say'

Answering your question ,I think you should....

As you asked me , I think....

In reply to your question....

Thanks

Question

answering your question or in answering
Informally , when writing a letter in respond to another one , what do you most say'

Answering your question ,I think you should....

As you asked me , I think....

In reply to your question....

Thanks

Answer

Absolutely agree with the need for resourceful options when it comes to learning or sharing! Just like how in business we look for efficient solutions — for example, I recently came across a service offering cheap custom boxes, which helped my small packaging startup reduce costs without compromising quality. It’s all about finding smart ways to do more with less

Answer

To answer your question.....is least formal. At least to me it is. So it all depends on the situation. Hannah has supplied the most usual phrases.

Answer

In answer to your question... I would say:
"In response/answer to your question".  "In answer to..." sounds slightly less formal than "in response to...".  
"To answer your question..." could also be used.

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