On a normal ruler the smallest increment (the smallest or shortest lines) is the 1/16" measurement. They are very close together, (this is a relative statement), in the context of just how close a person thinks the 1/16th" incremental mark is to the closest mark next to it.
where is .39 on a ruler
You look at the markings on its edge.
They are equal
They denote different fractions of the inch. A good engineers ruler will have 64 ths, 32 nds 16 ths and 8 ths at least.
One fourth of 1 inch. Look at a ruler and divide a half inch in half-that's a quarter inch.
0.35 is close to 11/32 which means if your ruler has divisions of sixteenths, it will be between 5/16 and 6/16.
12/16 is 3/4 13/16 will be a hair to the right of 3/4
where is .39 on a ruler
The 4th dash on a ruler represents 4/16 of an inch, which is equivalent to 1/4 of an inch.
i inch
11/16
You will not be able to see 0.79 of an inch on a US ruler. The best you can hope for is 0.8 inches. On a ruler, an inch is usually divided into 10 or 16 parts - the smaller, unnumbered marks between the inch marks. You can get 32 divisions on tape measures but they are unusual on rulers. Select a part of the ruler in which each inch is divided into 10 parts. Eight of them will make 0.8 inch. You will not be bale to tell the difference between 0.8 inch and 0.79 inches by eye!
1.18 inches on a ruler would be located between the 1 inch and 2 inch markings on the ruler. It would be slightly closer to the 1 inch mark than the 2 inch mark. Keep in mind that most rulers are divided into 16 equal parts per inch, with each tick mark representing 1/16 of an inch. So, on a standard ruler, the 1.18 inches mark would be located slightly beyond the 18/16 (1.125) mark and slightly before the 19/16 (1.1875) mark.
2.5 cm looks like about 1 inch on a ruler
You look at the markings on its edge.
They are equal
One fourth of 1 inch. Look at a ruler and divide a half inch in half-that's a quarter inch.