First we need to find the L.C.M. of the denominators of the given fractions to create equivalent fractions.
i.e., L.C.M. of 2, 4 and 5, which is 20.
Note that 12=1020, 34=1520, 25=820, 45=1620 and 35=1220.
Now since 8<10<12<15<16, we have 25<12<35<34<45