In September, Claire weighed 187.4 pounds. By March she weighed 163.5 pounds. What rational number represents the change in Claires weight?

To find the rational number that represents the change in Claire's weight from September to March, subtract her March weight from her September weight:

\[
\text{Change in weight} = \text{September weight} - \text{March weight} = 187.4 - 163.5
\]

Now, calculate the difference:

\[
\text{Change in weight} = 187.4 - 163.5 = 23.9
\]

The rational number that represents the change in Claire's weight is **23.9** pounds. This represents a weight loss of 23.9 pounds.

Would you like more details or have any questions? Here are five related questions:

1. How would you represent the change in weight as a fraction?
2. If Claire continued to lose weight at the same rate, how much would she weigh in six more months?
3. What is the percentage change in Claire's weight from September to March?
4. How would you calculate the average monthly weight loss?
5. If Claire gains back half the weight she lost, what would her new weight be?

**Tip:** When dealing with weight loss, subtracting the final weight from the initial weight gives you the total weight loss.

Learn how to calculate the change in weight using rational numbers with a detailed step-by-step solution. This problem involves subtracting Claire's weight in September from her weight in March, showing a weight loss of 23.9 pounds. Suitable for students in Grades 4-6.

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