Mathematics
OpenStudy (anonymous):

nobody knows how to do this question!!!!

OpenStudy (anonymous):

hero (hero):

$E_p = \frac{\%\Delta \space \text{quantity demand}}{\%\Delta \space \text{in price}}$

OpenStudy (anonymous):

still no clue

hero (hero):

Don't you have the formulas for those?

OpenStudy (anonymous):

no that is the only provided information

hero (hero):

The formulas are probably in your textbooks

OpenStudy (anonymous):

checked they are but the problems are not like this one