3.25 ... 3.4
3.25 < 3.4
Step 1: Make the decimals have the same number of places.
Write (3.4) as (3.40). (Adding a zero at the end does not change the value.)
Now we compare: (3.25) and (3.40).
Step 2: Compare place by place.
Ones place: both are (3).
Tenths place: (2) (in (3.25)) and (4) (in (3.40)).
Step 3: Decide using the tenths.
Since (2 < 4), the number with (2) in the tenths place is smaller.
Conclusion: (3.25 < 3.4).