Question

plz answer this ques.

Answer 1

see the examples of yr book

Answer 2

when a:b=5:7 and b:c=14:15
so we have to find out a and c
=》5/7=14/15
=》according to question we have to find out a:c
=》a=5
=》c=15
so 5/15=1/3
hope this answer will be useful for u please mark me as branliest answer