The ratio boys to girls on the bus 20/15. find three ratios equivalent to the described ratio

4/3 , 8/6 and 12/9 are equivalent ratios to the ratio shown above.

We can find equivalent ratios by dividing or multiplying the numerator and denominator by a same number.

20/15 

Since 20 and 15 are both divisible by 5, I will divide each by 5.

20/5=4
15/5= 3

4/3 is equivalent to 20/15

Now we can multiply by 2.

20*2
15*2

40/30

40/30 is equivalent to 20/15

Finally, we will multiply 20 and 15 by 3.

20*3=60
15*3= 45

60/45 is equivalent to 20/11

Our three answers : 60/45 and 40/30 and 4/3

The answer is