The oldest man in the world is 110 years old . If his younger brother is 9/10 of his age how old is his younger brother?

(9/10) * 110 = 990/10 = 99

Thank you

You're welcome.

66 years old

To find the age of the younger brother, we need to calculate 9/10 of the age of the oldest man.

First, let's determine 9/10 of 110 years.

To do this, we multiply 110 by 9/10:

(110) × (9/10) = (110 × 9) / 10 = 990 / 10 = 99 years

Therefore, the younger brother is 99 years old.