help!!math let me know if the result is right?

Question

1) Divide 6/25 / 2/15 write the result in simplest form

This is my answer, please let me know if is ok

6/15 / 2/15=

2) Estimate
19/20 * 3 1/9

this is my answer
3 1/9=4/9

19/20 * 4/9
19/20 *9/4 =171/80


6/15 *15/2 = 90/50

Thanks,

1) 6 /25* 15/2= 90/50


2)
3 1/9=4/9

19/20 * 4/9
19/20 *9/4 =171/80

I'm trying is this correct

Answer 1

1) Divide 6/25 / 2/15 write the result in simplest form.

6/25 / 2/15 = 6/25 * 15/2
=90/50
=9/5. [this is the simplest form]

2) Estimate
19/20 * 3 1/9

3 1/9 = 28/9

so, 19/20 * 28/9 = 532/180 = 133/45

Answer 2

(6/25)/(2/15) =6*15/2*25 =18/10 =1.8

same than 90/50
Correct