Solution

158541

First name
Tilly
Country
Age
13

After working out the other calculations in Amrita's list that have the same answer with the subtraction and division signs, I found some patterns.

1) When the mixed number is written as an improper fraction the numerator of the improper fraction is the number that is subtracted squared.

2) The sum of the numerator and the denominator in the mixed number is equal to the number that is subtracted.

3) The denominator of the mixed number is the integer of the mixed number subtract 2.