Ответы и объяснения

2012-05-16T05:06:50+00:00

(1/3+0.75)/(2/3+5/12) = (1/3+ 75/100) : (8/12 + 5/12) = (1/3+ 1/3) : (8/12 + 5/12) =

=2/3 : 13/12 = 2/3 * 12/13 =  2 *12/3 *13 =   2 *4/13 = 8/13