You could use the answer to 45 / 3 to write down part of the answer to 4.5 / 3. Then you would add the decimal where it needs to be.
Example:
56 / 4 = 14
5.6 / 4 = 1.4
Answer:
Step-by-step explanation:
28.22
Take .28 and multiply it by 100.8 to find the sum