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Let's solve part (a) of this problem.

### Given:
- Ahmad spent $1350 on a laptop.
- He then spent $ \frac{3}{5} $ of his remaining money on a watch.
- After these purchases, he had $ \frac{1}{7} $ of his total money left.

### To find:
- The fraction of the total money Ahmad spent on the laptop.

Let the total amount of money Ahmad initially had be $ x $.

1. After spending $1350 on the laptop, the remaining amount of money is $ x - 1350 $.
2. He then spent $ \frac{3}{5} $ of this remaining amount on a watch, so the amount spent on the watch is:
   \[
   \frac{3}{5}(x - 1350)
   \]
   The remaining money after buying the watch is:
   \[
   (x - 1350) - \frac{3}{5}(x - 1350) = \frac{2}{5}(x - 1350)
   \]
3. It's given that this remaining amount is $ \frac{1}{7} $ of his total money $ x $, so we set up the equation:
   \[
   \frac{2}{5}(x - 1350) = \frac{1}{7}x
   \]
4. Solving this equation will give us the value of $ x $, which is the total amount of money Ahmad had initially.

Let me solve this for $ x $.Ahmad initially had \$2100.

### Fraction spent on the laptop:
Since Ahmad spent \$1350 on the laptop, the fraction of his total money spent on the laptop is:

\[
\frac{1350}{2100} = \frac{9}{14}
\]

Thus, Ahmad spent **$\frac{9}{14}$** of his money on the laptop.

Would you like further details or have any questions? Here are some related questions:

1. How much did Ahmad spend on the watch?
2. What is the total fraction of money spent on both the laptop and the watch?
3. What fraction of Ahmad's money was left after buying the laptop and the watch?
4. How would the fraction change if Ahmad had spent \$2000 on the laptop?
5. What is the importance of fractions in financial budgeting?

**Tip**: When solving real-world problems, always define variables clearly to set up equations correctly.

Ahmad had some money. He spent $1350 on a laptop and 3/5 of the remaining money on a watch. He had 1/7 of his money left. What fraction of the money did Ahmad spend on the laptop?

In this problem, Ahmad spent $1350 on a laptop and 3/5 of the remaining money on a watch. Learn how to determine the fraction of his total money spent on the laptop using algebraic techniques, fractions, and equation setup. Suitable for students in Grades 8-10.

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