8: Percentage Calculations

How many grams of zinc oxide would be in 100 grams of 10% zinc oxide ointment?

• 10 grams

• 12 grams

• 15 grams

• 20 grams

What is the percent strength of a zinc oxide ointment if you prepared 120 grams of an ointment that contains 8 grams of zinc oxide?

• 2.23%

• 6.67%

• 8%

• 12%

What would be the percent strength of a zinc oxide ointment if you added 340 grams of an ointment to 12 grams of zinc oxide?

• 6.27%

• 1.72%

• 3.41%

• 5%

What is the percent strength vol/vol of a 720 milliliter solution that contains 30 milliliters of liquified phenol?

• 2.89%

• 12.2%

• 4.17%

• 1.74%

What would be the percent wt/vol of a solution of KCl that contains 18 grams of KCl in 180 milliliters?

• 10%

• 12%

• 15%

• 25%

How many milligrams of KCl would be in 400 milliliters of 15% KCl?

• 60 mg

• 40 mg

• 4,000 mg

• 60,000 mg

If a patient's serum glucose is reported as 172 mg/dL, express the values as a mg%.

• 17.2 mg%

• 172 mg%

• 1.72 mg%

• 0.172 mg%

Express 212 mg% as a normal weight-in-volume percentage.

• 2.12%

• 212%

• 0.212%

• 2120%

If your drinking water contains 3ppm, how many milligrams of flouride is in every million milliliters of water?

• 3 mg

• 300 mg

• 3,000 mg

• 30,000 mg

Write 4ppm as a ratio.

• 4:1,000,000

• 4:1

• 1:250,000

• 1:4