Use the fact that 1 pound equals about 453.6 grams.
1.5
Practice makes perfect
We want to express 680.4 grams in pounds.
680.4 g≈ lb
We can do this by using the fact that 1 pound equals about 453.6 grams. Let's write this relationship as a unit ratio.
453.6 g/1lb
To perform the conversion, we need to multiply 680.4 grams by the unit ratio or its reciprocal. Remember, we want to get the weight in pounds, and every unit we do not want has to be divided out.
We found that 680.4 grams is equal to about 1.5 pounds. We can now complete the given statement.
680.4 g≈ 1.5 lb
Extra
Common Conversion Factors
The following tool can be used to help you explore some of the most commonly used conversion factors. Conversions can be made both within or between the Metric System and the Imperial System — which is also known as the U.S. Customary System.
Around the world, people use conversion factors on a regular basis. You can read more about some practical applications of conversion factors in our original content.
