For 10 rows, she takes = 12 min.
So, for 1 row, she'll take = 12/10
Now, for 15 rows, it would be: 12/10 * 25 = 12/2 * 5 = 60/2 = 30
So, Your Final Answer would be 30 minutes
Hope this helps!
1 1/2 * 3/4 =
Change 1 1/2 to an improper fraction = 3/2
3/2 * 3/4 = 6/4 * 3/4
6/4 * 3/4 = 18/4 = 4 2/4 = 4 1/2
The answer is 4 1/2.
Hope this helped☺☺