7/8 +5/6

in my book in makes the LCD 24 but why can it not be 18 since 8x2=16

and 6x3=16 ????

I get 29/16 the book gets 41/24 because its using 24(LCD)

What am I doing wrong????

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- Feb 16th 2009, 08:08 PMsteresopolisreducing problem (LCD)
7/8 +5/6

in my book in makes the LCD 24 but why can it not be 18 since 8x2=16

and 6x3=16 ????

I get 29/16 the book gets 41/24 because its using 24(LCD)

What am I doing wrong???? - Feb 16th 2009, 08:49 PMsanmo4
ya 8*2 is 16, but 16 cannot be divided by 6 without remainder, 6*3 = 18 not 16. so what you have done is wrong there.

so the common one is 8*3 = 6*4 = 24

7/8*3/3= 21/24

5/6*4/4 = 20/24

adding we get 41/24.