whats 3/18*4/7*19/38*3/16 simplified?

Question

 my math teacher gave this to me but i dont understand anything he has explaind

Answer 1

3/18*4/7*19/38*3/16 =

 

 

3*4*19*3
–––––––––– =
18*7*38*16

 

3*4*19*3*1
–––––––––––––––– =
3*3*2*7*2*19*4*4

1
––––––– =
2*7*2*4

 

1
–––– =
16*7

 

1
––––– =
70+42

 

1
–––
112

Answer 2

Ellenna,

 

       For starters 3/18 =1/6 and 19/38=1/2 so the product is (1/6)*(4/7)*(1/2)*(3/16)=(4/42)*(3/32)=(2/21)*(3/32)=(2/7)*(1/32)=(1/7)*(1/16)=1/112.

At each step look for common factors.

 

Jim