Three friends (Sarah, Jane and Gina) are employees of a company. Their respective salaries are in the ratio of 1 : 3 : 7. Jane and Gina's salaries together is Rs. 7000. By what percent is Gina's salary than that of Sarah?  Choose the correct choice from the following choices:
A) 200%  B) 600%  C) 100%  D) 300%  E) 400%
Explanation:   Let the salaries be x, 3x and 7x respectively.   Then,3x + 7x = 7000 =&gt; x = 700.   Sarah's salary = Rs. 700, Jane's salary = Rs. 2100, and Gina's salary Rs. 4900.   Excess of Gina's salary over Sarah's=[ (4200 /700) x 100] = 600%.   Answer: 600%
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Three friends (Sarah, Jane and Gina) are employees of a company. Their respective salaries are in the ratio of 1 : 3 : 7. Jane and Gina's salaries together is Rs. 7000. By what percent is Gina's salary than that of Sarah?