One hundred is one-thousandth of one hundred thousand.
nine hundred ninety nine thousand, nine hundred, ninety nine
Nine hundred ninety-nine thousand, nine hundred ninety-nine
100 is 1/1000th of 100,000. So, you could say it is one thousand times less.
Very simply imagined by asking how many times a hundred will go into a thousand. If you find that the answer is ten then you can say that one hundred is ten times less than one thousand. (1000÷100=10)
270,000 is less than a million. It would be 0.27 (27/100) of a million-- around a quarter million.
A trillion is commonly 1,000,000,000,000 or one million million. So half a trillion would be 500,000,000,000 or five hundred thousand million. Less commonly, but still accepted in some places, a trillion is 1,000,000,000,000,000,000 or one million million million. So half a trillion would be 500,000,000,000,000,000 or five hundred thousand million million.