Answer:
On a Timeline a milestone 11 years in the future will be the 11/20 of a milestone 20 years in the future and to the 11/25 of a milestone 25 years in the future.
Step-by-step explanation:
Milestone - 20 years in the future.
[tex]x = \frac{11\,yr}{20\,yr}[/tex]
Milestone - 25 years in the future.
[tex]y = \frac{11\,yr}{25\,yr}[/tex]