Lee had a total of 40 e-mails on Monday. Eight of the e-mails were from her friend Cara. What percent of the e-mails were from Cara?

A) 8%

B) 20%

C) 32%

D) 40%

(8 / 40) * 100 = 20% of the emails were from Cara.

To find the percent of the e-mails from Cara, divide the number of the emails which are from her by the total number of emails and multiply the quotient by 100%. This is shown below,

(8 / 40) x 100% = 20%

Thus, 20% of the emails are from Cara.