The crispy rice treats have cooled, Mrs. Williams cuts them into 30 equal pieces. She gives two-fifths of the treats to her son and takes the rest to school. How many treats will Mrs. Williams take to school?

18 pieces

Step-by-step explanation:

divide 30 by 5

you'll get 6

so one-fifth is equivalent to 6 of the pieces

multiply 6 by 2

you'll have 2 so two-fifths is equal to 12 pieces of rice crispy treats

subtract 12 from 30

30 - 12 = 18

So she took 18 pieces to school.

the answer is c.

step-by-step explanation: