Let's firstly convert the mixed fraction to "improper" and then proceed,

7/25, 9/10
For the denominators (25, 10) the least common multiple (LCM) is 50.
Therefore, the least common denominator (LCD) is 50.
14/50, 45/50
Answer:
You would need a total of 3 3/4 cups. First double the amount of butter= 3 cups, then half 1 1/2 cups for the last cup of flour which would be 3/4. Add them together, it would equal 3 3/4 cups.
Step-by-step explanation:
Yes they are prime if that's the question u just asked