Answer:
Just divide each amount by 9....so.....
Monday 12 / 9 = 4 / 3 = 1 + 1/3 batches
Tuesday 22 + 1/2 = 45/2
So (45/2) / 9 = 45 / 18 = 5/2 = 2 + 1/2 batches
Thurssday 6 / 9 = 2 / 3 batches
Friday 7 + 1/2 = 15/2
So (15/2) / 9 = 15 / 18 = 5 / 6 batches