Answer:
distance need to walk is 3/20
Step-by-step explanation:
To stay healthy, Emily decided to walk for 4/5 miles everyday. She walked 2/5 mile to work and walked 1/4 mile at lunchtime.
Target distance is 4/5 miles
walked 2/5 miles and walked 1/4 miles
Total mile walked is [tex]\frac{2}{5} +\frac{1}{4}[/tex]
LCD is 20
make the denominators same and add the fractions
[tex]\frac{2}{5} +\frac{1}{4}\\\frac{8}{20} +\frac{5}{20}\\\\\frac{13}{20}[/tex]
Target distance is 4/5 miles
Now subtract the miles walked from targeted distance
[tex]\frac{4}{5} -\frac{13}{20} \\\frac{16}{20} -\frac{13}{20}\\\frac{3}{20}[/tex]
so distance need to walk is 3/20
