Just when it seems that you do indeed *have* a brain, you post something
like this. If a mortgage rate goes up from 5% to 6%, the monthly payment on
a 30 year mortgage goes up by a little under 12%...not 20%.

Sorry, but I'm not the one who needs to see the Wizard about a brain. When
money costs 6%, it *is* 120% as expensive as when it costs 5%.

"So, why doesn't the payment go up by 20?" inquires NOYB.

Good question, Doc. It's because your monthly payment includes principal as
well as interest, and the prinicpal portion of the payment doesn't increase,
only the interest.