Answer:
1/3= 4/12 4+9= 13/12=1 1/12 4-1 1/12=2 1/2
3/4= 9/12
Step-by-step explanation:
If her sister added 4 more 3/4 cups to make the total amount of flour in the bowl 3 3/4 cups all total. Then to make is 4 cups of flour, they will have to add 1/4 more cups of flour.