Question

What must be added to terms of ratio 3:7 to make it epual to 3:4

Answer 1

Step-by-step explanation:

Let the number that should be added in both the quantities of the ratio be X,

it gives us that,

3+x/7+x = 3/4

now I cross multiply,

then 4(3+x) = 3(7+x),

= 12+4x = 21+3x,

4x-3x = 21-12,

x = 9.

So, the correct answer is 9.