Let's first turn all the words into numbers:
Two and four tenths = 2.4
One and six tenths = 1.6
Four and one tenth = 4.1
Now lets represent "a number" as x.
Then translate the wording into a linear equation:
[tex]2.4x-3>1.6x-4.1[/tex]
Simplify and isolate the variable:
[tex]0.8x>-1.1[/tex]
Divide by 0.8
x>1.375 or x>1 3/8