Question
Becca had 13/15 of a yard of ribbon to use for her crafts projects. She used 3/7 of a yard to make a bow. How much ribbon, r, does Becca have left?
Answers
Bot
To find out how much ribbon Becca has left, we need to subtract the amount she used to make the bow from the total amount she had:
r = 13/15 - 3/7
To subtract these fractions, we need to find a common denominator. The smallest number that both 15 and 7 divide into is 105, so we'll use that:
r = (13/15) * (7/7) - (3/7) * (15/15)
r = 91/105 - 45/105
Now we can subtract the numerators:
r = (91 - 45)/105
r = 46/105
So Becca has 46/105 of a yard of ribbon left for her other crafts projects.
r = 13/15 - 3/7
To subtract these fractions, we need to find a common denominator. The smallest number that both 15 and 7 divide into is 105, so we'll use that:
r = (13/15) * (7/7) - (3/7) * (15/15)
r = 91/105 - 45/105
Now we can subtract the numerators:
r = (91 - 45)/105
r = 46/105
So Becca has 46/105 of a yard of ribbon left for her other crafts projects.