take away or subtract by 2/3, which would be under half of the original.
For example... If you start with 18 and you reduce by 2/3 you end up with 6.
18 x 2 / 3 = 6.
This is very confusing. 2/3 is not under half the original. 1/3 is what is left behind which is less than half the original. Also 18 x 2/3 is not 6. It is two thirds of 18, and since one third is 6, two thirds is 12. So reduce by two thirds means take away 12 leaving 6. The general thing is to "multiply by" or "divide by", but simply "add" or "subtract", which I think is why this confusion has come about.
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Two thirds is actually equal to four sixths. You have to reduce four sixths by dividing the numerator and denominator by a common factor, which in this case is 2.
Two thirds of five and a quarter are three and one half. Five and a quarter is 21/4. Two thirds is 2/3. Multiply the two together and you get 42/12. Reduce to 7/2, and convert back to normal form to get 3 and 1/2.
Two-thirds. If I have three boxes and I fill up one and then I fill up two, which would be the bigger amount? Two boxes out of three, right?
4 and two thirds 4 and two thirds