Rebecca had 9/10 of a yard of ribbon. Then she gave 7/20 of a yard to a friend. How much does she have left?
[Please learn to type fractions correctly on Jiskha.]
9/10 - 7/20 = 18/20 - 7/20 = ?
Thank you starlight. This helped.
To find out how much ribbon Rebecca has left, we need to subtract the amount she gave to her friend from the total amount she initially had.
Rebecca had 9/10 of a yard of ribbon. To express this fraction correctly, you can type it as 9/10.
Next, she gave 7/20 of a yard to her friend. Similarly, you can type this fraction as 7/20.
To subtract fractions, we need a common denominator. In this case, it is 20 because it is the least common multiple of 10 and 20.
To convert 9/10 to a fraction with a denominator of 20, we can multiply both the numerator and denominator by 2. This gives us (9/10) * (2/2) = 18/20.
Now we can subtract the fractions:
18/20 - 7/20 = (18 - 7)/20 = 11/20.
Therefore, Rebecca has 11/20 of a yard of ribbon left.
Note: It is essential to type fractions correctly to ensure accurate calculations and answers.