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

To represent the change in Claire's weight with the correct sign, we calculate the difference as follows:

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

Now, calculate the difference:

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

The rational number that represents the change in Claire's weight is **-23.9**. The negative sign indicates a weight loss.

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 negative fraction?
2. What does the negative sign in the change of weight indicate?
3. How would the answer change if Claire had gained weight instead?
4. What is the percentage decrease in Claire's weight from September to March?
5. If Claire continued to lose weight at the same rate, what would her weight be in three more months?

**Tip:** In problems involving changes, the sign of the result indicates the direction of the change—negative for a decrease and positive for an increase.

Learn how to calculate the change in weight from September to March using arithmetic operations. Understand the concept of negative numbers in the context of weight measurement. Suitable for Grades 4-6.

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