A **proportion **ratios. and such that The ratio or can be simplified and then make more complex to make the other.

Proportions can be used in Arithmetic or Algebra, it is when two ratios are set equal to each other. The ratios in proportions can be wrote as fractions or normal divisions and pronounced **a to b equal c to d.**

In proportions the two terms in the middle are called **means** when the other two on the sides are called **extremes**, for example the means in a:b=c:d are b and c and the extremes are a and d. Instead in the ratios the first term is called **antecedent** and the other is called **consequent**, for example in a/b, the antecedent is a and the consequent is b.

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