3/4 * 5/7 = -2/3 * 11/9 = Merci :)

bonsoir

3/4 x 5/7 = 15/28

-2/3 x 11/9 = - 22/27

[tex] \frac{3}{4} \times \frac{5}{7}= \frac{3\times5}{4\times7} = \frac{15}{28} \\ \\ - \frac{2}{3}\times \frac{11}{9} =- \frac{2\times11}{3\times9} =- \frac{22}{27} [/tex]