Răspuns:
a) 70/91 = ( simplificam prin 7) = 10/13
b) 72/12 = ( simplificam prin 12) = 6/1= 6
c) 160/340 = ( simplificam prin 100) = 16/34= ( simplificam prin 2) = 8/ 17
d) 1400/700 = ( simplificam prin 700) = 2/1=2
e) 161/105 = ( simplificam prin 7) = 23/ 15