You add the time she already drove (15+10) and get 25
56-25 = 31 minutes left.
Now if the 56 minute trip includes the stop at the store, we are OK with that answer. If not, then we have to know how long she stopped at the store and add it onto 31 minutes.
Make an equation:
x= 16% x 50
x= 16 50
---- x ---- Cross Multiply
100 1
x= 16
------ = 8
Eleven subtract nine is two; eight adding three is eleven (2,11)
For this case we must find the product of two mixed numbers:

So, we have:

If we go to a mixed number we have:

Answer:
