Today middle school and highschool are servung pizza. Middle school does not repeat meal until the 15th day. Highschool repeats on the 20th day. When will middle school and highschool both serve pizza again?

The answer to your question is 60 days

Step-by-step explanation:

Data

Middle school every 15th day

High school every 20 day

When will the schools serve pizza again?

Process

1.- Calculate the Least Common Factor

                    15   20   2

                    15    10   2

                    15     5   3

                      5    5   5

                       1     1

LCF = 2 x 2 x 3 x 5

       = 60 days

2.- Conclusion

In 60 days Middle school and Highschool will serve pizza again.

were is the equation