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QUICK ANSWER
"Less" is a form of "less", an adjective which is often translated as "menos". "Equal to" is a preposition which is often translated as "igual a". Learn more about the difference between "less" and "equal to" below.
less()
An adjective is a word that describes a noun (e.g., the big dog).
a. menos
Your neighbor's dog has less hair than yours.El perro de tu vecino tiene menos pelo que el tuyo.
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
equal to()
A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
b. lo mismo que
20 Mexican pesos is equal to one American dollar.20 pesos mexicanos son lo mismo que un dólar americano.
a. capaz de
You won't be equal to the task if you don't believe in yourself.No serás capaz de cumplir la tarea si no tienes confianza en ti mismo.
