To convert 2.8 into a fraction, follow these steps:
1. **Write down the number as a fraction of one:**
\( 2.8 = \frac{2.8}{1} \)
2. **Multiply both the numerator and the denominator by 10 for every digit after the decimal point:**
Since 2.8 has one digit after the decimal, multiply by 10:
\( \frac{2.8 \times 10}{1 \times 10} = \frac{28}{10} \)
3. **Simplify the fraction:**
To simplify \( \frac{28}{10} \), find the greatest common divisor (GCD) of 28 and 10, which is 2.
\( \frac{28 \div 2}{10 \div 2} = \frac{14}{5} \)
So, 2.8 as a fraction is \( \frac{14}{5} \).