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| Numbers and Sets |
 About Algebra
Addition and Subtraction Multiplication and Division Criterions for Divisibility
 Types of NumbersGeometric Interpretation of Real Numbers Irrational Number  Properties of Real Numbers FractionsProportions Property of Equal Proportions Absolute ValuesGraphical Illustrations
SetsSubsets Operations with Sets Intervals |
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Equivalent fractions are known as proportions.
Proportions are solved by the cross product property: Therefore,
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