13.a)2/10,3/10,4/10,5/10,8/10,9/10,10/10,25/10.
b)5/100,10/100,12/100,25/100,35/
100,40/100,50/100,75/100.
c)2/8,3/9,4/9,5/9,6/9,7/9,8/9,9/9.
14.a)10/8,9/8,8/8,5/8,4/8,3/8.
b)7/8,7/7,7/6,7/5,7/4,7/2.
c)100/100,70/100,50/100,40/100,30/
100,10/100.
Sper că te-am ajutat !!!