11 / 17 numerator plus denominator minus the same number at the same time, it can be divided into 9 / 5 approximately?

11 / 17 numerator plus denominator minus the same number at the same time, it can be divided into 9 / 5 approximately?


Answer: 13 / 4
11 + 17 = 28, then the score before subtracting this number is 28 / 17, which turns into a difference problem
This number is: (9 * 17-5 * 28) / (9-5) = 13 / 4



The numerator and denominator of (11,17) are subtracted by the same number at the same time, and the result is (4,7). What is the number subtracted?


(11-x)/(17-x)=4/7
x=3