TCS Company Numerical Ability Ratio and Proportion

in february the ratio of salaries of peter and john is 4:5. in march both are getting rs.2000 less than february. what is the ratio of the salaries in february?

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TCS Other Question

if a/b = c/d = d/e = 14/17.what is the value of (4a+5c+7d)/(4b+5d+7c)?
two numbers are in the ratio of 5:6.if 5 is subtracted from each number,the ratio becomes 4:5. the numbers are?