Englishfor English speakers
proportion
Noun
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The proportion is the relationship in size between one part and another.
Health care spending is taking up a much larger proportion of the government budget.
The proportion of water to sugar should be two to one.
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
stair
Noun
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A stair is one flight of steps.