Can someone please explain to me how to do this problem? "The fractions of regions in a country with maximum interstate highway speed limits up to and including 70 mph was 43/50. The fraction of regions with 70 mph speed limits was 29/50. What fraction of regions had speed limits that were less than 70 mph?

Question

Can someone please explain to me how to do this problem? "The fractions of regions in a country with maximum interstate highway speed limits up to and including 70 mph was 43/50.  The fraction of regions with 70 mph speed limits was 29/50. What fraction of regions had speed limits that were less than 70 mph?

phi · Answer

they are saying  43/50  states have speed limits from say 50 up to 70
they are saying 29/50 have a speed limit of exactly 70

they want to know how many have slower speed limits than 70
to find out we subtract

43/50 - 29/50
that will be the number with limits slower than 70