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Mathematics
Orion
13 June, 16:46
How do i work out: 3/4-3/5
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Sidney Murray
13 June, 19:38
0
In order to add or subtract fractions, they must have the
same denominator. You need to change both of these
fractions to have the same denominator ... without changing
their values, of course.
The smallest common denominator for these fractions is 20.
3/4 is the same amount as 15/20.
3/5 is the same amount as 12/20.
Now that they have the same denominator, you can do
the subtraction.
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Trent Blackwell
13 June, 20:40
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First step: Get a common denominator.
3/4:-
3*5=15
4*5=20
3/5:-
3*4=12
5*4=20
Now we can subtract easily because we have common denominators.
15/20-12/20
15-12/20
3/20
Now we have our most simple answer: 3/20
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