In June, Mr. Chen's students read 40 books. In July, they read 30 books. What is the percent increase or decrease in the number of books they read?

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.

do you have an easier question cause this shh is hard like theheck

step-by-step explanation:

wait this depends wether emily and zach how they are thinking.

yes they are the same.