Hi, This is the answer.
.
Mortage is a bank loan.
Loans are when the bank gives you a certain amount of money with interest.
When you get a loan you always have to pay them back the amount of money you were loaned. Plus interest.
Interest is a fee you get charged when you get a loan from a bank.
Interest is always a percentage. The person you are loaning the money from always gets to choose how much interest.
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Hope this helps!! Good Luck and God Bless! :)