Power Formulas
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Fractions Formulas
Mixed Fraction
Equivalent Fractions
With the Same Denominator
With Different Denominator
Multiplying Fractions
Dividing Fractions
Radical Formulas
Rationalization
1 
2 
3 
Ratio Formulas
Ratio
where,
is the antecedent(numerator),
and
is the consequent(denominator).
Proportion
where,
are extremos,
and
are medios.
Mean Proportional
Third Proportional
Fourth Proportional









I’m afraid this article (on cardinal numbers) has an unfortunate error. Zero must be considered a cardinal number. The definition of a cardinal number given by the Penguin Dictionary of Mathematics is “A number that indicates the number of elements in a set.” It also defines a null set or empty set containing no elements. The cardinality of this set is 0.