Bonjour,
[tex](\dfrac{7}{5}+\dfrac{3}{4}) * \dfrac{14}{15} =(\dfrac{7*4}{5*4}+\dfrac{3*5}{4*5})*\dfrac{14}{15} =\dfrac{43}{20} *\dfrac{14}{15} =\dfrac{602}{300} =\dfrac{301}{150}[/tex]
[tex]\dfrac{7}{5}+\dfrac{3}{4} *\dfrac{14}{15} =\dfrac{7}{5}+\dfrac{3*14}{4*15}= \dfrac{7}{5} +\dfrac{42}{60} =\dfrac{7*12}{5*12}+\dfrac{42}{60}= \dfrac{126}{60}= \dfrac{21}{10}[/tex]
