Question

what number should be added to 5/16 to get 21/18
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Answer 1

Answer:

21/18 - 5/16

(168-45)/144........... ( LCM of 16 and 18 is 144 )

123/144

Answer 2

Answer:

To get 21/18, you should subtract 5/16 from 21/18

So,

$\frac{21}{18} - \frac{5}{16} \\ \frac{7}{6} - \frac{5}{16} \\ \frac{56 - 15}{48} \\ \frac{41}{48}$

Hope it helps you.

I have simplified 21/18 in the second step.