B- 3/4 = 1/5 .how do you get the answer b. because of whatever the answer to be is - 3/4? it has to equal 1/5

b = 19/20

Step-by-step explanation:

This is a subtraction problem. So you reverse the problem so that it is addition.

So now the problem should look like 1/5 + 3/4.

To solve this, first get the lowest common denominator.

None of the denominators will work so you have to find the least common multiple of the two numbers, 5 and 4, which is 20.

Place the new denominator under the two fractions to make a new addition problem.

1/5 + 3/4

/20 + /20 = /20.

Divide 20 by each denominator and multiply the quotient by the numerator.

20/5 = 4 4*1 = 4

20/4 = 5  5*3 = 15.

Add the new numerators.

4/20 + 15/20 = 19/20.

So  b = 19/20