Answer:
The age of Jenny's mom is 40 % of age of Jenny's great-grandmother. (Input: 40)
Step-by-step explanation:
The percentage needed is calculated by the following expression:
[tex]x = \frac{n_{M}}{n_{G}}\times 100\,\%[/tex]
Where:
[tex]x[/tex] - Percentage of Jenny's mother with respect to Jenny's great-grandmother, measured in percentage.
[tex]n_{M}[/tex] - Age of Jenny's mother, measured in years.
[tex]n_{G}[/tex] - Age of Jenny's great-grandmother, measured in years.
If we know that [tex]n_{M} = 36\,yr[/tex] and [tex]n_{G} = 90\,yr[/tex], the percentage is:
[tex]x = \frac{36\,yr}{90\,yr} \times 100\,\%[/tex]
[tex]x = 40\,\%[/tex]
The age of Jenny's mom is 40 % of age of Jenny's great-grandmother.
