Bredhurst Receiving and Transmitting Society

Advanced Radio Amateur Examination

maths...Q4


First do not be ashamed that you have looked at the answer to check if you got it right. Better to learn slowly but fully than get the answer wrong!


Q4. What is the result of 2/3 - 1/2 ??

Now this is a bit more tricky as we have to make the numbers below the divide line the same before we can subtract one from the other.

We have a 3 and a 2 below the divide line. So multiply them together = 6

Now we have to convert 2/3 to something/6

so multiply the top and the bottom by 2 = 4/6

Now we have to convert 1/2 to something/6

so multiply the top and the bottom by 3= 3/6

then 4/6 - 3/6 = 1/6

Mathematically that would look like this :-

 then the result is

that equals in decimal terms :- 0.166666666   

which to two decimal places is  0.17

Try it on your calculator and do it in stages

2 divided by 3 =   write down the answer(1)

1 divided by 2 =   write down the answer(2)

Now enter answer(1) and subtract answer(2)  and see what you get !!

It should be 0.1666666 which is the same as above.


However if this is not clear to you please speak to your tutor for some more additional maths help.

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