What must be added to each term of the ratio `2:5` so that it may become equal to `5:6?`

What must be added to each term of the ratio 2:5 so that it may equal to 5:6 ?

what number should be added to each term of the ratio 2:5 so that is may become equal to 5:6?

What quantity must be added to each term of the ratio x : y so that it may become equal to c : d ?

What number must be added to each term of the ratio 7:5 so that it becomes 4:3?

(i) What quantity must be added to each term of the ratio 8 : 15 so that it becomes equal to 3 : 5 ? (ii) What quantity must be subtracted from each term of the ratio a : b so that it becomes c : d ?

What must be added to each term of the ratio 3 : 5 so that the new ratio becomes 5 : 6 ?