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# Dividing whole numbers to get a decimal

Sal divides 63÷35. Created by Sal Khan.

## Want to join the conversation?

• Is it possible to turn 1,000,000,000 into a fraction and or a decimal?
• 1 billion can be 1,000,000,000 over 1 can be simplified :)
• Why in the practice questions its placing the bigger number outside of the division symbol roof thing? I always put the bigger number on the inside and the smaller number on the outside. Example; 24/60, when doing long division id place the 24 outside and the 60 inside to ultimately get 2.5. But the example is doing the opposite and is getting 0.4. I just thought the bigger number was always on the inside.
• Well both are division probles, 24 divided by 60 is different than 60 divided by 24.

24 divided by 60 has 60 outside the division symbol while 60 divided by 24 has 24 outside of it.

It's not about bigger numbers, but what is dividing what. Though, if the number outside is igger than what is inside then the answer is going to be less than 1, while if the larger number is inside then it will be greater than 1, which you saw with that 2.5 vs. .4
• Why 9÷60 = 9÷6÷10 In other words, if you want to break down 60 into 10 and 6 we should say (6 x 10) not (6÷10) ?
• Suppose you have a 9-inch stick.
If you cut the stick into 6 equal pieces, then 9÷6 is the length of each piece in inches.
Now suppose you cut each of these pieces into 10 smaller equal pieces. Then 9÷6÷10 is the length of each (smallest) piece in inches. Furthermore, the original stick has now been cut into 6 x 10 = 60 equal pieces! So 9÷60 also represents the length of each (smallest) piece, in inches.

Therefore, it makes sense that 9÷60 = 9÷6÷10, with 60 = 6 x 10. That is, 9÷6÷10 = 9÷(6 x 10).

Have a blessed, wonderful New Year!
• Like multiplying decimals this was equally confusing. I have a general understanding of adding and subtracting decimals but this is just gibberish in my head. I couldn’t make heads or tails of what he was trying to say. Is there a simpler way to divide decimals?
• There are tricks for some decimal division problems. For example:

1) Dividing by 0.5 is the same as multiplying by 2.

2) Dividing by 0.25 is the same as multiplying by 4.

3) Dividing by 0.2 is the same as multiplying by 5.

4) Dividing by 0.1 is the same as multiplying by 10.

5) Dividing by 0.01 is the same as multiplying by 100.
• I am confused. So where does Sal honestly get the decimal from? Does it just pop out of nowhere? I’m sorry. I’m just confused 🤷‍♀️.
• 19=19.000000000. It originally has a decimal but because it has zeroes behind it it is not put there. The zeroes don't pop out of nowhere. You can put them in behind with a decimal to use. Ask people you know for more help. I hope this helps. Also being confused is a good thing. It makes you want to think harder and by thinking harder and asking specific questions like this will help you become unconfused.
• Is it possible to turn 1,000,000,000 into a fraction or a decimal?
I feel it would be Confusing?
• if you have 12/20 why would it switch to 20/12? He has 63/35, but it switches to 35/63. Why?
• If you have a problem like 5/(12/20), you have to solve it by multiplying 5 to the reciprocal of 12/20. So, it'll become like this, 5/(12/20) ----> 5 * 20/12 -----> 100/12 = 25/3.

Note: Reciprocal is just flipping the integer or fraction over. 5 ----> 1/5 and 12/20 ----> 20/12