Letโs solve it ๐
Allen was 5 years old when his dad was 30 years old.
That means the age difference between them is:
๐ 30 โ 5 = 25 years
Now his dad is 70 years old, so Allen must be:
๐ 70 โ 25 = 45 years old โ
Answer: Allen is 45 years old