Question

write the ratio 3:4,5:9,7:8 is descending order ​

Answer 1

converting 3:4 to fraction= 3/4

converting 5:9 to fraction= 5/9

converting 7:8 to fraction=7/8

now taking lcm of fractions of 4,9 and 8=72

3*18/4*18=54/72

5*8/9*8=40/72

7*9/8*9=63/72

As we can see the  descending order now

so the descending order for ratio becomes=63/72>54/72/40/72

                                                                            = 7/9>3/4>5/9                                                                            

therefore it becomes 7:9>3:4>5:9

Answer 2

Answer:

In descending order , 7:9 > 3:4 > 5:9 .

Step-by-step explanation:

We can observe,

3:4= 3/4 = 0.75

5:9= 5/9 = 0.556 (Approx.)

7:8= 7/9 = 0.875 (Approx.)

Now, 0.556 < 0.75 < 0.875

or, 5/9 < 3/4 < 7/9

or, 5:9 < 3:4 < 7:9

or, 7:9 > 3:4 > 5:9