How much will a lender refinance a rental property based 70% LTV

[Tracy Sharpe]

I am reading Brando Turner's book, Rental Property Investing, pg 69, Refinance. I guess in this example the $105,000 that he has in the house must have been in cash? Now he's refinancing it based on the Value of $150,000 with a 70% LTV to get $105,000 back and then reinvesting $105,000. Anyone, please explain. I don't get it.

Also, how do I determine the amount that a lender will refinance a rental property? For example, I have a rental property that is valued at $150,000. I have a mortgage of $75,000. How much would a lender refinance the house based on the 70% LTV rule for me to get money out to reinvest and how much money would I get out of this?

Is the calculation 150,000 x 70% = $105,000. Is this what the bank will loan me on top of the $75,000 mortgage? Or am I supposed to subtract $105,000 - $75000 = $30,000 which is what the bank will loan me. This would make my new loan $105,000 versus $75,000 which I would use the $30,000 to purchase a new rental. Is this correct. Please provide feedback.