What must be added to the two numbers, which are in ratio 5: 12, so that the new ratio becomes 3:4?
5
8
12
16
Explanation:
Let x be the required number.
Then, According to the question,
=> (5+x)/(12+x) = 3/4
=> 20 + 4x = 36 + 3x.
=> x = 16.