Question

1/5 of students chose swimming 3/8 of the students chose tennis all the rest students chose cricket what fraction of students chose cricket

Answer 1

17/40

because 1/5 is will be 8/40

and 3/8 will be 15/40

plus those together will get you 23/40

40-23 is 17/40

Answer 2

To make it easier, I’m going to make the fractions so that they both have the same denominator. To do this i have to multiply both the top and the bottom of one fraction by the other fractions denominator for both fractions.
When i do that, I get:

swimming: 8/40
tennis: 15/40

If you add those fractions together, you will get 23/40.

40-23=17 So, 17/40 of students chose cricket.