To determine how much older Mary is than Elizabeth, we first need to know their ages. Let’s assume that Mary is 25 years old and Elizabeth is 20 years old.

### Then, to calculate the age difference, we can use the following steps:

- State Mary’s age: 25 years old
- State Elizabeth’s age: 20 years old
- Subtract Elizabeth’s age from Mary’s age:
- Mary’s age: 25 years
- Elizabeth’s age: – 20 years
- Difference: 25 – 20 = 5 years

Therefore, the age difference between Mary and Elizabeth is 5 years. Mary is 5 years older than Elizabeth.

## Quick recap

To quickly recap:

- Mary is 25 years old
- Elizabeth is 20 years old
- To find the age difference:
- Take Mary’s age and subtract Elizabeth’s age
- 25 – 20 = 5 years

- Therefore, Mary is 5 years older than Elizabeth

## Exploring other scenarios

The specific ages used above were hypothetical. Let’s explore some other possible scenarios to demonstrate calculating relative ages.

### Scenario 1

- Mary is 30 years old
- Elizabeth is 25 years old
- Mary’s age – Elizabeth’s age = 30 – 25 = 5 years
- In this scenario, the age difference is still 5 years. Mary is still 5 years older than Elizabeth.

### Scenario 2

- Mary is 40 years old
- Elizabeth is 15 years old
- Mary’s age – Elizabeth’s age = 40 – 15 = 25 years
- In this scenario, the age difference is 25 years. Mary is 25 years older than Elizabeth.

### Scenario 3

- Mary is 20 years old
- Elizabeth is 35 years old
- Elizabeth’s age – Mary’s age = 35 – 20 = 15 years
- In this scenario, the age difference is 15 years. But since Elizabeth is older, Elizabeth is 15 years older than Mary.

As shown above, the process is the same regardless of the actual ages. By subtracting the younger person’s age from the older person’s age, we can determine the age difference between them.

## Age difference patterns

Based on the examples above, we can observe some patterns about calculating age differences:

- The person with the greater age is older
- To calculate the age difference, subtract the younger person’s age from the older person’s age
- The age difference expresses how many years older the older person is compared to the younger person
- The age difference remains the same no matter which person’s age you start with (as long as you subtract the younger age from the older age)

These patterns apply whenever you need to calculate the relative ages of two people.

## Visualizing age differences

To provide a visual representation of age differences, we can create a simple table:

Person A | Person B | Age Difference |
---|---|---|

Mary, 25 years old | Elizabeth, 20 years old | 5 years |

Mary, 30 years old | Elizabeth, 25 years old | 5 years |

Mary, 40 years old | Elizabeth, 15 years old | 25 years |

Elizabeth, 35 years old | Mary, 20 years old | 15 years |

This table summarizes the age difference findings from the examples above in a clear and concise format. The age difference column shows how many years older the older person is than the younger person in each scenario.

## Applying the concepts

Let’s apply the concepts from this article to determine age differences in some real-world scenarios:

### Example 1: Siblings

- Emily is 32 years old
- Her brother James is 27 years old
- Emily is older, so:
- Emily’s age: 32 years
- James’ age: 27 years
- Emily’s age – James’ age = 32 – 27 = 5 years

- Therefore, Emily is 5 years older than her brother James

### Example 2: Parent and child

- Jennifer is 41 years old
- Her son Michael is 7 years old
- Jennifer is older, so:
- Jennifer’s age: 41 years
- Michael’s age: 7 years
- Jennifer’s age – Michael’s age = 41 – 7 = 34 years

- Therefore, Jennifer is 34 years older than her son Michael

### Example 3: Teacher and student

- Mr. Johnson is 55 years old
- His student Samantha is 11 years old
- Mr. Johnson is older, so:
- Mr. Johnson’s age: 55 years
- Samantha’s age: 11 years
- Mr. Johnson’s age – Samantha’s age = 55 – 11 = 44 years

- Therefore, Mr. Johnson is 44 years older than his student Samantha

As shown through these real-world examples, the process for calculating age differences applies to any two people, young or old.

## Conclusion

In summary, calculating the age difference between two people is straightforward:

- Determine which person is older and their age
- Determine the younger person’s age
- Subtract the younger age from the older age
- The result is the age difference in years
- The age difference expresses how many years older the older person is than the younger person

Conceptually, understanding that age differences demonstrate relative age and not absolute age is important. With this knowledge, you can easily calculate age gaps in various real-world situations for family members, friends, teachers, celebrities, historical figures, and more. Calculating age differences is an informative way to compare ages and understand age relationships.