1. The problem is to convert the decimal number 1.5 into a fraction. 2. To convert a decimal to a fraction, write the decimal number as the numerator and use a power of 10 as the denominator based on the number of decimal places. 3. For 1.5, there is one decimal place, so write it as \frac{15}{10}. 4. Simplify the fraction by dividing numerator and denominator by their greatest common divisor, which is 5. 5. \frac{15 \div 5}{10 \div 5} = \frac{3}{2}. 6. Therefore, the decimal 1.5 as a fraction is \frac{3}{2}.