Question

Select the correct answer. Anna wants to walk 2(1)/(2) kilometers. She completed 1(1)/(7) kilometers. How many kilometers does she have left to walk?

Answer 1

Anna has 19/14 kilometers left to walk.

Step-by-step explanation:

To find how many kilometers Anna still has to walk, we need to subtract the distance she has already completed from the total distance she wants to walk.

Anna wants to walk 2(1)/(2) kilometers, and she has already completed 1(1)/(7) kilometers. We can convert these mixed numbers to improper fractions:

Total distance = 2(1)/(2) km = 5/2 km

Distance completed = 1(1)/(7) km = 8/7 km

To find how much Anna has left to walk, we subtract the distance completed from the total distance:

Left to walk = Total distance - Distance completed
Left to walk = 5/2 - 8/7 km

Now we need to find a common denominator for the fractions:

Left to walk = (5*7)/(2*7) - (8*2)/(7*2) km
Left to walk = 35/14 - 16/14 km

Simplifying the fraction:

Left to walk = (35 - 16)/14 km
Left to walk = 19/14 km

So, Anna has 19/14 kilometers left to walk.