Answer:
Step-by-step explanation:
First, we need to work out how many lots of green we can make with yellow dye. To do this, we need to divide the total number of drops used by the amount ber batch needed.
12/3 = 4
We can make 4 batches of colouring. We know we need 12 drops of yellow, but we need to work out blue.
To do this, we times the number of batches by the number of drops needed per batch.
4 x 4 = 16
Therefore, we need 16 drops of blue to make the same shade of green.
