Don’t worry. Most people don’t understand decimals. They don’t know if there is a difference between .11 and .110 or .1100.
I’ve seen people in graduate school who can’t tell you which is larger, .170 or .71. Many of them explain their answers this way: “Everything works backwards to the right of the decimal.”
A device that reads .11 is precise to the hundredths place. A device that reads .110 is precise to the thousandths place. So a device that reads .110 is, in theory, a better device than one that reads just .11.
You are so right; if there is anything that the American people know less about that politics, it’s decimals AND fractions! Most could never do eighth grade math; even Obama confesses to that failure.