Rebecca had 9/10 of a yard ribbon. Then she gave 7/20 of a yard to her friend. How much does she have left? Explain your work.
plz help, already overdue, thanks!
To find out how much ribbon Rebecca has left, we need to subtract the amount she gave to her friend from the initial amount she had.
1. Start with the initial amount of ribbon Rebecca had: 9/10 of a yard.
2. Subtract the amount she gave to her friend: 9/10 - 7/20.
To subtract fractions, we need to make sure the denominators are the same:
- The denominator for 9/10 is 10.
- Since 7/20 already has a denominator of 20, we don't need to convert it.
- To make the denominators the same, we can multiply the numerator and denominator of 9/10 by 2: (9/10 * 2/2) - 7/20.
This gives us: 18/20 - 7/20.
3. Subtract the numerators: 18 - 7 = 11.
4. Keep the same denominator: 11/20.
Therefore, Rebecca has 11/20 of a yard of ribbon left.
To find out how much ribbon Rebecca has left, you need to subtract the amount she gave to her friend from the original amount she had.
Rebecca initially had 9/10 of a yard of ribbon. Next, she gave 7/20 of a yard to her friend.
To subtract fractions, you need to have a common denominator. In this case, the common denominator will be 20, since it is a multiple of both 10 and 20.
So, in order to express the fractions with a common denominator of 20, you need to rewrite 9/10 as 18/20.
Now, you can subtract the given fraction:
18/20 - 7/20 = 11/20
Therefore, Rebecca has 11/20 of a yard left after giving 7/20 to her friend.
Please note that it's always helpful to simplify the fraction if possible. In this case, 11/20 cannot be simplified further, so the answer remains 11/20.
9/10 - 7/20
your LCD will be 20
change 9/10 to 18/20 and go for it, pretty simple