How would you convert 3598 grams into pounds?
You use the conversion factor that relates grams and pounds.
A conversion factor is a fraction that represents the relationship between two different units. A conversion factor is ALWAYS equal to 1.
You know that 1 lb = 453.592 g
Thus, the conversion factor is either
You use whichever one gives you the correct units for the answer, because each conversion factor equals 1.
For your problem, we would write
3598 g ×
Notice that you use the conversion factor with "g" on the bottom. This makes the units cancel and gives an answer with the units of "lb".
Hope this helps.