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first you need a common denominator which is 12

in the first fraction we already have a 12, so we don't need to multiply times anything, but the second fraction already has a 4, so what times 4 is 12, 3. So we multiply top and bottom by 3.

7(1)-1(3)/12=(7-3)/12=4/12=1/3

(I think)

how I done it: 7 x 4 and 1 x 12

12 x 4 and. 4 x 12

= 28 over 48 and 12 over 48

= 28 - 12

= 16 over 48 simplified to 1 over 3

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