What is the total percentage of loan that can be borrowed from the bank?

-What is the total amount of loan in percentage that can be borrowed from bank? ( can I say percentage?).

-They have been approved for xxx percent of the total amount of loan that they applied.

-Borrower can qualify up to xxx percent of the amount that the borrower have applied for.

-Is 70 percent a good percentage or it go a little higher than that?

What is the maximum loan to property ratio percent for mortgage ?

Did I phrase the above sentences correctly ?