alleryStart learning →A serving of cereal provides 85 mg of potassium, which is 2% of the recommended daily amount. What is the total recommended daily amount?
A1,700 mg
B170 mg
C4,250 mg
D8,500 mg
Answer & Solution
Correct answer: C. 4,250 mg
1. Let a equal the total recommended daily amount of potassium.
2. 85 mg is 2% of that total, so the sentence translates to 85 equals 0.02 times a.
3. Divide both sides by 0.02 to get a equals 4,250.
4. Check that this makes sense: 2% is a small share, and 85 is indeed a small part of 4,250.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 3 "Math Models", section 3.2 Solve Percent Applications_
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