At the A-Street Fish Market a vendor sells fresh caught fish. His store is filled with 2/7 bass, 1/5 tuna, 1/7 trout, and the rest are catfish. If a customer just bought 1/7 of all the tuna and 1/7 of all the catfish, and a fisherman arrived to restock the bass, doubling the number of bass, what proportion of fish now in the store are trout? Options:  A) 30/71  B) 4/7  C) 5/43  D) 1/2  E) 1/5
Bass = 2/7 = 10/35   Tuna = 1/5 = 7/35   Trout = 1/7 = 5/35   Catfish = 1 - (10/35 +7/35 + 5/35) = 13/35   Purchased: Tuna = 7/35 - (7/35)(1/7) = 6/35, and   Catfish = 13/35 - (13/35)(1/7) = 12/35   Stocked: doubling the number of bass (2)(10/35) = 20/35   Now:   20 + 6 + 5 + 12= 
<gadget id="calculator">  20 + 6 + 5 + 12</gadget>
<output>43</output>
43   Trout proportion is now 5/43.   Answer: 5/43
<result>C</result>
At the A-Street Fish Market a vendor sells fresh caught fish. His store is filled with 2/7 bass, 1/5 tuna, 1/7 trout, and the rest are catfish. If a customer just bought 1/7 of all the tuna and 1/7 of all the catfish, and a fisherman arrived to restock the bass, doubling the number of bass, what proportion of fish now in the store are trout?