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
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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.