What number must be subtracted from each term of the ratio `17 : 33` so that the ratio becomes `7 : 15`

What least number must be subtracted from each term of the ratio 15 : 19 to me the ratio 3 : 4 ?

(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 ?

What should be added to each term of the ratio 7: 13 so that the ratio becomes 2:3

What should be added to each term of the ratio 7:13 so that the ratio becomes 2:3

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