Jamal walked 7/10 of a mile on Monday. He walked 9/40 of a mile on Tuesday. Jamal estimated how much farther he walked on Monday then on Tuesday. Which statement explains if or not 3/10 is a reasonable estimate for the difference

7
10
of a mile on Monday. He walked
9
40
of a mile on Tuesday. Jamal estimated how much farther he walked on Monday than on Tuesday as shown below.

Step 1
7
10
is close to
1
2

Step 2
9
40
is close to
1
5

Step 3
1
2
−
1
5
=
3
10
Which statement best explains whether or not
3
10

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