Of all the homes on Gotham Street, 2/3 are termite-ridden, and 1/5 of these are collapsing. What fraction of the homes are termite-ridden, but NOT collapsing?  Choices
A) a) 2/15	B) b) 8/15	C) c) 4/5	D) d) 2/5	E) e)1/5
let total homes be 15   termite ridden= 2/3(15)= 10   termite ridden and collapsing = 1/5(10)=2   thus homes that are termite ridden, but not collapsing = 10-2= 
<gadget id="calculator">10-2</gadget>
<output>8</output>
8   thus required ratio= 8/15   Answer b) 8/15
<result>B</result>
Of all the homes on Gotham Street, 2/3 are termite-ridden, and 1/5 of these are collapsing. What fraction of the homes are termite-ridden, but NOT collapsing?