Jenna bought a spool of ribbon for her craft projects.It contained 5 3/4 meters of ribbon.She used 3 2/5 meters of ribbon for a project.How many meters of ribbon does Jenna have left? I am trying to figure this question out to help my 4 grader.so I need to know how to explain it because he has a whole page of these questions.
5 3/4 - 3 2/5
Change 3/4 to 15/20
change 2/5 to 8/20
5 - 3 = 2
15/20 -8/20 = 7/20
Ans. 2 7/20
To find out how many meters of ribbon Jenna has left, you need to subtract the amount of ribbon she used for her project from the total amount she bought.
First, let's convert the mixed numbers to improper fractions for easier calculations:
5 3/4 meters = (4 * 5) + 3 = 23/4 meters
3 2/5 meters = (5 * 3) + 2 = 17/5 meters
To subtract fractions, we need to have the same denominator. So, let's find the least common denominator (LCD) between 4 and 5, which is 20.
Now we can convert both fractions to have the same denominator:
23/4 meters = (23/4) * (5/5) = 115/20 meters
17/5 meters = (17/5) * (4/4) = 68/20 meters
Subtract the fractions:
115/20 meters - 68/20 meters = (115 - 68)/20 meters = 47/20 meters
So, Jenna has 47/20 meters of ribbon left.
In order to express this fraction as a mixed number, divide the numerator (47) by the denominator (20):
47 รท 20 = 2 remainder 7
Therefore, Jenna has 2 and 7/20 meters of ribbon left.