Hello everyone!!
Can someone please tell me how 11/14 is gotten in this problem? 2/7 + 1/2. (attachment in the replies).

Question

starfireandrobin · Answer

attachment

starfireandrobin · Answer

@agent0smith

starfireandrobin · Answer

@welshfella

rc3212 · Answer

you needed to find a common denominator and 2 times 7 equals 14

welshfella · Answer

you can only add fractions when the denominators are the same

so here you have to find the lowest common denominator of 7 and 2   which is 14.

starfireandrobin · Answer

Was cross multiplication involved?

rc3212 · Answer

yes when you multiply the bottom you always have to multiply the top too

welshfella · Answer

so to convert to a fractio  with denominator  = 14:-

1    *  7              7
-               =      --                               we multiply by2  by 7 to give 14 Note we must
2     *  7             14                                 multiply the top and bottom by 7.

welshfella · Answer

in a similar way   we multiply 2/7  by 2/2  to get  4/14

so now we can add

7/14  + 4/14  = 11/14

starfireandrobin · Answer

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