vs
QUICK ANSWER
"Per" is a form of "per", a preposition which is often translated as "por". "That is" is a phrase which is often translated as "eso es". Learn more about the difference between "per" and "that is" below.
per(
puhr
)A preposition is a word that indicates the relationship between a noun and another word (e.g., He ran through the door.).
that is(
thaht
ihz
)A phrase is a group of words commonly used together (e.g., once upon a time).
a. eso es
Apparently that is what he wants to wear for the dance.Aparentemente eso es lo que se quiere poner para el baile.
a. es decir
I can work with Andrés, that is, if he wants to work with me.Puedo trabajar con Andrés, es decir, si él quiere trabajar conmigo.
b. o sea
I didn't really like her, that is, I'm not sure she's right for this position.No me cayó muy bien, o sea, no estoy seguro de que sea apropiada para este puesto.
