There are 60 office suites in a downtown building. For how many office suites does company C service the computers? - Company A services the computers at 1/3 of the office suites - Company B services the computers at 2/5 of the office suites

Company C services 16 office suites.

Company A services 1/3 of the suites and Company B services 2/5; together they service 1/3+2/5. Find a common denominator; 15 is the smallest:

1/3=5/15

2/5=6/15

5/15+6/15 = 11/15

This means that 1-11/15 = 4/15 of the suites are serviced by Company C.

4/15 of 60 = 4/15 (60) = 4/15 (60/1) = 240/15 = 16