Question

Okay, this isn’t a homework question I randomly came up with it but I don’t know how I should calculate it. So say someone has 108 billion dollars, and they buy something that’s 20 million dollars . What percent of the 108 billion did they spend?

Answer 1

You can put it down to the .00000 whatever it calculates to, also id like to know how you got that so then I understand that lol I really don’t know how this came to my head, I even asked my mom but she didn’t know how to calculate it so ?

Answer 2

If you know how many ending zeros are in 108 billion (108,000,000,000 - nine zeros) and in 20 million (20,000,000 - seven zeros) then you can remove the amount of zeros that both numbers share -this case, both share 7 ending zeros. 10,800 and 2.
Now just divide: 2/10800 = 0.00018518518

You can test out this theory by trying the original numbers and then this. You will get the same result.

Answer 3

Thanks Pat, have a good day