SOLUTION: How do I multiply 4 1/5 x 10/21 x 9/20? It has been 31 years since I have taken math and this question has lost me. I have looked over my examples that I have and I just do not

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: How do I multiply 4 1/5 x 10/21 x 9/20? It has been 31 years since I have taken math and this question has lost me. I have looked over my examples that I have and I just do not       Log On


   

Question 213782: How do I multiply 4 1/5 x 10/21 x 9/20?
It has been 31 years since I have taken math and this question has lost me. I have looked over my examples that I have and I just do not understand. I would appreciate your help, thanks
Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
4 1/5 x 10/21 x 9/20
First Convert the mixed number to an improper fraction:
%2821%2F5%29%2810%2F21%29%289%2F20%29
you can rewrite this as:
%28%2821%29%2810%29%289%29%29%2F%28%285%29%2821%29%2820%29%29
you can cancel the 21's first to make the subsequent multiplication easier:
%28%2810%29%289%29%29%2F%28%285%29%2820%29%29
You can do more cancelling or just multiply out the numerator and denominator (as i wil do) and cancel later:
90%2F100
Reduce this by dividing numerator and denominator by 10:
highlight%289%2F10%29
================
Good Luck,
tutor_paul@yahoo.com