alleryStart learning →One serving of cereal has seven grams of fiber, which is 28% of the recommended daily amount. What is the total recommended daily amount of fiber?
A21 grams
B35 grams
C20 grams
D25 grams
Answer & Solution
Correct answer: D. 25 grams
1. Let a be the total daily amount; the label translates to 7 = 0.28 times a.
2. Divide both sides by 0.28: a = 7 divided by 0.28, which is 25.
3. The recommended daily amount is 25 grams.
4. Check: 28% of 25 is 7, matching the label; 21 comes from multiplying 7 by 3, a guess rather than a translation.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 3 "Math Models", section 3.2 Solve Percent Applications_
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