Respuesta :

Apocrophon
The answer is D, 21 to 140
21 to 140 can be written as [tex] \frac{21}{140} [/tex]
So if you multiply [tex] \frac{3}{20} [/tex] by [tex] \frac{7}{7} [/tex], you get [tex] \frac{21}{140} [/tex].