Loan to Value (LTV) is the difference between the value of a property and the mortgage balance owing against it – for example if you are applying for a mortgage of £90,000 on a property worth £100,000 this would be 90% LTV. The easiest way to work this out is to divide the loan amount by the property value, and x100 – eg, 90000 / 100000 x100 = 90%.