Question: 5 divided by what equals 3?
Answer: Therefore, the answer to what divided by 5 equals 3 is 15. You can prove this by taking 15 and dividing it by 5, and you will see that the answer is 3. Tip: For future reference, when you are presented with a problem like "What divided by 5 equals 3?", all you have to do is multiply the two known numbers together.