How can you divide with mixed numbers

You take the whole number and multiply the denominator then add the numerator so it'd become an improper fraction.  You change the division sign to a multiplication sign and take the 2nd fraction and flip it. Then just multiply and there's your Answer.

Step-by-step explanation:

3 1/4  ➗ 1 3/4 =  3x4=12+1= 13 so thatd be 13/4 and do the same with the other one. (1x3 = 3 + 4 = 7/4 ) You keep the same denominator.

then after you do that you'd have this ( 13/4 ➗ 7/4)  You change the division to multiplication (13/4 x 7/4) After you change that take the SECOND fraction (7/4) and flip it. (4/7)        // So you'd be left with  13/4 x 4/7   13x4 is 52 and 4x7 is 28 so you'd have 52/28

KCF (keep, change, flip)

I'm sorry if I'm wrong in some of this, or if you're talking about something else but if you are talking about this and still don't understand this just tell me and I'll try to explain it a bit easier xD

The last option.

Step-by-step explanation:

1. By definition the ratio of the perimeter is the same as the scale factor.

2. Keeping this on mind, you can calculate the scale factor as shown below:

3. You can rewrite it as following:

4:3

4. Therefore, the ratio of the perimeter is 4:3