Oh, dude, half of 13.78 on a ruler would be like 6.89. You know, just take that number and divide it by 2. Easy peasy lemon squeezy. But seriously, who measures things that precisely anyway? Just eyeball it and call it a day!
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Guess what? I used the calculator that comes built into my computer to figure out the answer. It was quick and I got the answer within seconds and it is 1378.
Protractor .
231/1378 is already in its simplest form
That depends on the ruler. If you refer to a 1 foot ruler, divided in inches and sub-inch divisions, then 0.39 inch is a more than a quarter inch, and less than a half inch.
1/4, a fourth (if you don't get why i'd probably suggest you see a ruler) well its actually a quarter but fourth is easy to remember