Multiply how far she walked each day by the number of days.
= 9/10 mile * 5 days
multiply numerator (top) by 5
= (9*5)/10
= 45/10
reduce by 5
= 9/2
convert to mixed number (2 goes into 9 four times with a remainder of one)
= 4 1/2 miles
ANSWER: She walked 4 1/2 miles in 5 days.
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