Ten equals two.

The unit is 7.

The tenth is 0.

The percentile is 9.

One thousandth is five.

To the left of the decimal point, from right to left, there are units, ten, hundred, thousand and ten thousand respectively. . . .

To the right of the decimal point, from left to right, there are decimals, percentiles, thousandths and tens of thousands respectively. . .

take for example

0. 1 is one tenth, so 1 is in the tenth place.

0.0 1 is one percent, so 1 is a percentile.