To write 2 5 as a decimal, we need to convert the mixed number into an improper fraction and then divide the numerator by the denominator.
A mixed number is a number that consists of a whole number and a fraction. In this case, 2 5 is a mixed number that can be written as:
2 5 = 2 + 5/10
To convert the mixed number to an improper fraction, we multiply the denominator of the fraction by the whole number and add the numerator. This gives us:
2 5 = (2 × 10 + 5) / 10 2 5 = 25 / 10
Now that we have the improper fraction, we can divide the numerator by the denominator to write it as a decimal. We can do this by performing long division or by using a calculator. Here’s how to do it using long division:
Copy code2.5
10 | 25 20 — 5
So, 2 5 as a decimal is 2.5. We can also write this as 2.50 if we want to include a trailing zero to indicate that the number is precise to two decimal places.
In general, to write a mixed number as a decimal, we first convert it to an improper fraction and then divide the numerator by the denominator. This process can also be used to convert fractions to decimals by dividing the numerator by the denominator directly. Decimals are a way of representing fractions in a more compact and convenient form, and they are widely used in many areas of mathematics and everyday life.