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A compound contains 30 percent A and 70 percent B. What is the ratio A:B?

Answer and explanation

Correct answer: 3:7

The percentages of A and B are 30 and 70 respectively, so A:B = 30:70. Dividing both terms by 10 gives the simplest ratio, 3:7. The ratio 7:3 reverses the order and represents B:A. Exam tip: write the percentages in the stated order and simplify the ratio using their common factor.

Related tags

Chemical CompositionPercentage RatioLaws Of Chemical CombinationStoichiometry BasicsClass 11 ChemistrySome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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