## Prealgebra (7th Edition)

$200\text{ mg}\approx 0.007\text{ oz}$
If want to convert from milligrams to ounces, first we convert from milligrams to grams: $1\text{ mg}=0.001\text{ g}$ By multiplying both sides by $200$ we get: $200\text{ mg}=0.2\text{ g}$ After that, we have to consider the following conversion rate: $28.349\text{ g}\approx 1 \text{ oz}$ By dividing both sides by $28.349$, we get: $1\text{ g}\approx \frac{1}{28.349} \text{ oz}$ We multiply both sides by 0.2 in order to get the answer to the question: $200\text{ mg}=0.2\text{ g}\approx \frac{0.2}{28.349} \text{ oz}\approx 0.007\text{ oz}$