Example 2: A new baby weighs 7.8 lb, What is it’s mass in kilograms?
1. Determine your equivalence statement and possible conversion factors.
Equivalence Statement: 1kg=2.205 lb
Possible conversion factors: 1kg/2.205lb, 2.205lb/1kg
2. Start with the units you are converting from, written as a fraction.
3. Choose the correct conversion factor to make the units cancel out and multiply by it.
(Remember: In order to cancel out units(we want to cancel the feet), the units must be in the numerator and denominator.)
5.Multiply the remaining numbers to get your answer.
6.Simplify all answers, when possible.
7.8 kg/2.205=3.5 kg