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It looks like you're working on dividing whole numbers by simple fractions and have a subtraction problem as well. Let’s go through the examples and solve the subtraction problem for you.

1. **Example (Division of whole number by a fraction):**
   \[
   16 \div \frac{2}{4} = 16 \times \frac{4}{2}
   \]
   This involves changing the division into multiplication by the reciprocal of the fraction:
   \[
   = \frac{16}{1} \times \frac{4}{2} = \frac{16 \times 4}{1 \times 2} = \frac{64}{2} = 32
   \]
   So, \(16 \div \frac{2}{4} = 32\).

2. **Subtraction Problem:**
   \[
   1.24 - \frac{3}{8}
   \]
   To subtract a fraction from a decimal, it's easiest to convert both to fractions or decimals.

   First, convert 1.24 to a fraction:
   \[
   1.24 = \frac{124}{100}
   \]

   Now, we need a common denominator for subtraction with \(\frac{3}{8}\). The least common denominator (LCD) of 100 and 8 is 400.

   Converting both fractions:
   \[
   \frac{124}{100} = \frac{496}{400}
   \quad \text{and} \quad \frac{3}{8} = \frac{150}{400}
   \]

   Now, subtract:
   \[
   \frac{496}{400} - \frac{150}{400} = \frac{496 - 150}{400} = \frac{346}{400}
   \]

   Simplify the fraction:
   \[
   \frac{346}{400} = \frac{173}{200}
   \]

   As a decimal, \(\frac{173}{200} = 0.865\).

   Therefore, \(1.24 - \frac{3}{8} = 0.865\).

Would you like further details on any of the steps or more explanations?

Here are some related questions for you to explore:

1. How do you convert mixed numbers to improper fractions before dividing?
2. What is the rule for dividing by a fraction?
3. How do you find the least common denominator for two fractions?
4. Can all decimals be converted to fractions easily?
5. What are some common mistakes when subtracting fractions from decimals?

**Tip:** When subtracting fractions from decimals, it’s often easier to convert everything to decimals to avoid complex fraction arithmetic.

Learn how to solve the subtraction problem 1.24 - 3/8 by converting decimals to fractions and using the least common denominator. This guide is ideal for students in Grades 6-8 who want to understand subtracting fractions from decimals.

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