Răspuns:
a)(144/25 - 9/4) • 5/13 =
(576-225)/100 • 5/13 =
351/100 • 5/13 =
351/260
b)(169/25 - 4/9) • 5/7 • 27/29 =
(1521-100)/225 • 5/7 • 27/29 =
1421/45 • 1/7 • 27/29 =
1421/5 • 1/7 • 3/29 =
4263/1015
