Brandon is 40 years older than his son. 4 years from now, his son will be ¹₂ of his age while his cousin will be ³₅ of his son. Express his cousin’s present age as a fraction of Brandon's present age. Leave your answer in its simplest form.

	Brandon	Brandon's son	Brandon's cousin	Difference between Brandon and Brandon's son
Before	10 u - 4	5 u - 4	3 u - 4	40
Change	+ 4	+ 4	+ 4
After	2x5	1x5
		5x1	3x1
Comparing Brandon, his son and his cousin in the end	10 u	5 u	3 u	5 u

The repeated identity is the age of Brandon's son. LCM of 1 and 5 is 5.

The difference in age between Brandon and Brandon's son remains unchanged.

Difference in age between Brandon and Brandon's son
= 10 u - 5 u 
= 5 u 

5 u = 40

1 u = 40 ÷ 5 = 8

His cousin's present age 
= 3 u - 4
= 3 x 8 - 4
= 24 - 4
= 20

Brandon's present age
= 10 u - 4
= 10 x 8 - 4
= 80 - 4
= 76

His cousin's present age as a fraction of Brandon's present age
= ²⁰₇₆
= ⁵₁₉

Answer(s): ⁵₁₉