Math
posted by Justine on .
Can I reduce these fractions before I multiply them together? because when i multiply them I get some huge numbers. thank you
11/52 times 39/80
21/25 times 15/28
32/121 times 33/144
16/105 times 155/93

I don't think any of those fractions can be reduced.

You can "reduce" before you multiply if you can find a factor of one numerator and the other denominator.
11/52 X 39/80 52 and 39 are both divisible by 13, making your problem
11/4 X 3/30
21/25 X 15/28 21 and 28 both divisible by 7; 15 and 25 are divisible by 5, making the problem 3/5 X 3/4
Your answer should be the same either way. It just makes it easier in the end. 
yes u can not reduce any of the fractions which means they are not divisible by 7 15 25 and 5 ask your professor for help if needed