Question

The sum of 2 1/8 and 2/5 th of a rational number is 3. Find the rational number

Answer 1

Answer:

3/8

Step-by-step explanation:

Let the rational number be 'x'.

So,    21/8 + 2x/5 = 3

   or, (21×5/8×5) + (2x × 8/5×8) = 3

   or, 105/40 + 16x/40 = 3

   or, (105+16x)/40 = 3

   or, 105 + 16x = 120

   or, 16x = 15

   or, x = 15/16

Now, 2/5 of x

     = 2/5 of 15/16

     = 2/5 × 15/16

     = 3/8

Hope, it will help you.......