we know that
the total distance is 1 4/5 miles
she has walked 2/5 miles
so
Find the difference
but first
convert mixed number to an improper fraction
1 4/5=1+4/5=9/5 miles
9/5-2/5=7/5 miles
convert to mixed number
7/5=5/5+2/5=1+2/5=1 2/5 mi
