C ??

a) =  \(\dfrac{109}{132}\)

 = \(\dfrac{2}{9}\)

 = \(\dfrac{34}{48}\)

a. Rút họn : \(\dfrac{1313}{2828}=\dfrac{13}{28};\dfrac{2323}{4646}=\dfrac{1}{2}\)

➙ = \(\dfrac{13}{28}+x=\dfrac{1}{2}\)

                  x = \(\dfrac{1}{2}-\dfrac{13}{28}\)

                   x = \(\dfrac{1}{28}\)

b) \(\dfrac{13}{69}-x=\dfrac{17}{153}\)

              x  = \(\dfrac{13}{69}-\dfrac{17}{153}\)

              x  = \(\dfrac{16}{207}\)