Convert 3.5 to a fraction.

To convert the decimal 3.5 into a fraction, you start by recognizing that 3.5 can be broken down into two parts: the whole number 3 and the decimal 0.5.

The decimal 0.5 can be expressed as the fraction 1/2, since 0.5 is equivalent to 1 divided by 2. Therefore, when you combine the whole number and the fractional part, you can express 3.5 as:

3 + 0.5 = 3 + 1/2.

To combine these two components into a single fraction, you can convert the whole number 3 into a fraction with a common denominator. The whole number 3 can be written as 3/1, but for the sake of adding it to 1/2, we convert it with a denominator of 2. This is done as follows:

3 = 3 * 2/2 = 6/2.

Now you can add the two fractions together:

6/2 + 1/2 = (6 + 1)/2 = 7/2.

Thus, 3.5 is equivalent to the fraction 7/2. This is why 7/2