58/9-27/7=406-243/63= 163/63=2цел37/63
Вот, надеюсь, что разборчиво
<em><u />2/5 и 3/4=2/5*4 и 3/4 *5=8/20 </em>и<em> 15/20. НОЗ =20
1/6 и 3/10=1/6*5 и 3/10*3=5/30 и</em><em> 9/30 НОЗ= 30
5/6 и 5/8= 5/6*8 и 5/8*6 = 40/48 = 4/48
2/3 и 13/15= 2/3*5 и 13/15*1= 10/15 </em>≤13/15
<em>3/10 и 7/12 =3/10*12 и 7/12*10= 36/120 </em>≤<em> 70/120</em>