Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000.

How many pennies in Russell’s collection are dated after 2000?

To determine how many pennies in Russell's collection are dated after 2000, we need to follow these steps:

1. **Total number of pennies in the collection:**  
   Russell has 1,200 pennies in total.

2. **Percentage breakdown:**
   - 25% of the pennies are dated before 1980.
   - 35% of the pennies are dated from 1980 to 2000.
   - The remaining percentage is for pennies dated after 2000.

3. **Calculate pennies dated before 1980:**  
   \[
   25\% \text{ of } 1,200 = 0.25 \times 1,200 = 300 \text{ pennies}
   \]

4. **Calculate pennies dated from 1980 to 2000:**  
   \[
   35\% \text{ of } 1,200 = 0.35 \times 1,200 = 420 \text{ pennies}
   \]

5. **Calculate pennies dated after 2000:**  
   Since the remaining pennies are those dated after 2000, subtract the pennies dated before 1980 and from 1980 to 2000 from the total:
   \[
   1,200 - (300 + 420) = 1,200 - 720 = 480 \text{ pennies}
   \]

Therefore, **480 pennies** in Russell's collection are dated after 2000.

Would you like any additional details or clarifications?

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Here are 5 related questions:
1. What percentage of Russell’s collection is dated after 2000?
2. How many pennies are dated before 2000?
3. If Russell adds 100 more pennies to his collection, how many of those would be dated after 2000 if the percentages remain the same?
4. If 10% of the pennies dated after 2000 are lost, how many remain?
5. How many more pennies dated after 2000 would Russell need to make them 50% of his collection?

**Tip:** When working with percentages, it’s helpful to convert them to decimals before multiplying them with the total for accuracy.

Russell has a collection of 1,200 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000. How many pennies in Russell’s collection are dated after 2000?

Learn how to calculate how many pennies in a collection of 1,200 are dated after 2000 using percentages. Russell's collection includes 25% of pennies dated before 1980 and 35% dated from 1980 to 2000. This problem helps students apply basic arithmetic and percentage calculations, suitable for Grades 5-7.

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