Question

compare the ratio 5 ratio 12 and 7 ratio 9

Answer 1

5:12 and 7:9
by cross multiplication 5*9=45 and 12*7=84
therefore 7:9 is greater than 5:12

Answer 2

Answer

5 : 12    &    7 : 9

5\ 12       &   7\9

LCM of 12 & 9 = 36

5\12 x 3\3 = 15\36

7\9 x 4\4 = 28\36

comparing b\w

15\36   <    28\36

5\12   <    7\9

∴ 5 : 12   <  7 : 9

hope so this must be the answer......