When communication involves conveying a ratio, we often use fractions or decimals to convey that information. We may say we need three and a half kilograms of wheat while saying that it’s a quarter past two on the clock. When we present this information in one way or the other, the person we’re trying to convey to may also know one or the other. That being said, you’ll have to convert between the two often as it just happens that some people understand decimals better while others prefer using fractions. If you have good maths, you can easily do this kind of conversion in your head.
Or you can pull out some pen and paper and get to work on doing it yourself. It will be either very time consuming it’ll happen pretty fast. Almost all calculators nowadays come with the built-in conversion and if you have internet access, you can use a fraction to decimal converter at gigacalculator.com to save you the time of doing all the calculations in your head or on paper. Numerical conversions in general aren’t that difficult to achieve either, turning a fraction into a decimal is simply to put the numerator to the denominator and divide them.
We’re all taught long division in school so in reality it’s possible to do all of these things by hand. But the convenience of the modern world means we don’t have to. Not only are there many electronic calculators available in the market that can perform the division instantly, they can present the result in both fractions or decimal, whichever you prefer which you can then use later. If you don’t have a calculator, you’ll have to go buy one but the modern world means that you can easily access online resources to perform the same functions.