Question

The sum of the numbers j,k, and m is 115. The ratio of j to k is 2:7 and the ratio of k to m is 14:5. What is the value of k?

E. 61
F. 70
G. 78
H. 83

Answer 1

f. 70

Explanation:

I did it the easy way, so k has to be able to divide by 14 and 7. So i just divided all the answers by 7 first. Then 14. Only 70 is able to divide by 7 and 14. Lastly I just check to see if it works. 2:7 = 20=70. 14:5 = 70:25. 20+70+25=115.