Réponses

2014-03-15T13:05:55+01:00
((5/27)-7/3)/(7/9+1) = ((5/27 - 63/27))/ ( 7/9 + 9/9) = -58/27 le tout divisé par 16/9        =           -58/27 x 9/16 = -522/432
2014-03-15T13:11:18+01:00
(5/27 - 7/3) = 5/27 -7/3 X 9/9 = 5/27 -21/27 = -16/27  = -16/27 X 9/16 = 144/432 = 
 7/9 +1         7/9 + 1 X 9/9       7/9 +9/9         16/9

144/432= 16/27