If the numerator of a fraction is increased by 2 and the denominator by 1 it becomes 1. Again, if the numerator decreased by 4 and the denominator by 2 it becomes 1/2. Find the fraction.

A 4/5

B 5/6

C 6/7

D 7/8

Solution

Correct Answer: Option D

মনে করি ,

ভগ্নাংশটির লব =x
এর হর =y
ভগ্নাংশটি =x/y

প্রশ্নমতে ,
     (x+2)/(y+1)=1
 বা,x+2=y+1
বা,x=y+1-2
বা,x=y-1 ...(i)

আবার ,
 (x-4)/(y-2)=1/2
বা,2x-8=y-2
বা,2(y-1)-8=y-2
বা,2y-2-8-y+2=0
বা,y-8=0
বা,y=8

(i)
 x=8-1=7

ভগ্নাংশটি =7/8

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