The 70-year-old is 24 years older than the 46-year-old, which means it falls into the category of 'between 20 and 30 years'.
To determine how much older the 70-year-old is than the 46-year-old, we need to subtract the younger person's age from the older person's age.
The calculation would look like this: 70 years old - 46 years old = 24 years.
Therefore, the 70-year-old is 24 years older than the 46-year-old, which falls into the category of between 20 and 30 years.