Please help I need this done ASAP

Answer:
13.)
[tex] \frac{12}{40} = \frac{3}{10} [/tex]
c = 40
14.)
[tex] \frac{5}{12} = \frac{35}{84} [/tex]
b=84
15.)
[tex] \frac{44}{32} = \frac{11}{8} [/tex]
a=44
16.)
[tex] \frac{6}{15} = \frac{2}{5} [/tex]
a=6
17.)
[tex] \frac{12}{54} = \frac{2}{9} [/tex]
c=54
18.)
[tex] \frac{8}{3} = \frac{16}{6} [/tex]
b=6
Hope this helps : )