Ratios and Proportions
CCSS.Math.Content.5.NF.B.4 Apply and extend previous understandings of multiplication to multiply a fraction or whole number by a fraction.
A ratio shows the relative sizes of two or more values.
Proportion says that two ratios (or fractions) are equal. proporción
Variable: A symbol for a number we don't know yet. It is usually a letter like x or y. variable
equivalent fraction: fracción equivalente