Question attached..

I think the answer is 20

Step-by-step explanation:

to solve you take the number on the right, subtract it by one, then multiple the new number by the old one.

1-1=0x1=0

3-1=2x3=6

4-1=3x4=12

2-1=1x2=2

5-1=4x5=20

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.