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How to Say "ratio" in Spanish

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tasa

/TAH-sah//ˈtasa/

nounB1general
Use 'tasa' when referring to a rate or proportion commonly used in statistics, economics, or demographics, often implying a comparison of a part to a whole or a change over time.
A colorful bar chart showing three bars of increasing height.

Examples

La tasa de desempleo ha aumentado significativamente.

The unemployment rate has increased significantly.

La tasa de natalidad ha disminuido este año.

The birth rate has decreased this year.

El banco ofrece una tasa de interés muy baja.

The bank offers a very low interest rate.

Always Feminine

Even though it ends in 'a', just remember it always uses 'la' or 'una'. It doesn't change based on who is speaking.

The 'S' vs 'Z' Trap

Mistake: “Using 'tasa' when you want to drink coffee.”

Correction: Use 'taza' (with a Z) for a cup, and 'tasa' (with an S) for a rate or fee. They sound exactly the same in most of Latin America!

razón

nounC1formal
Choose 'razón' when you mean a mathematical proportion or a specific factor used to calculate something, often implying a direct relationship or a fixed rate.

Examples

El precio se ajustó a razón de 2 euros por kilo.

The price was adjusted at a rate of 2 euros per kilo.

Confusing 'tasa' and 'razón'

Learners often confuse 'tasa' and 'razón' because both can refer to rates. Remember that 'tasa' is more common for statistical rates (like birth rate, unemployment rate), while 'razón' is typically used for a specific mathematical proportion or a calculation factor.

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