Step-by-Step Solution for Converting 1.25 to a Fraction

Step 1: Understand the Number

The number 1.25 is a decimal, which can be broken into two parts:

• The whole number part is: 1.
• The decimal part is: 0.25.

We aim to convert the entire number into a fraction.

Step 2: Isolate the Decimal Part (0.25)

Focus on the decimal part (0.25) and represent it as a fraction.

Step 2.1: Write 0.25 as \( \frac25100 \)

The decimal 0.25 can be read as "25 hundredths." Mathematically, this is:

\[ 0.25 = \frac25100 \]

Step 2.2: Simplify the Fraction

Now simplify \( \frac25100 \) by finding the greatest common divisor (GCD) of 25 and 100.

• The GCD of 25 and 100 is: 25.
• Therefore, the simplified fraction is:

\[ \frac14 \]

Step 3: Combine the Whole Number and Fraction

The original number 1.25 is the sum of the whole number 1 and the fraction \( \frac14 \).

Combine these as a mixed number:

\[ 1.25 = 1 + \frac14 = \frac5/4 \]

Step 4: Verify the Answer

To verify, divide \( \frac5/4 \):

\[ \frac5/4 = 1.25 \]

Thus, the fraction is correct.

Final Answer

The decimal 1.25 as a fraction is:

\[ \frac5/4 \]

If expressed as a mixed number:

\[ 1 1/4 \]