Answer:
21/40
Explanation:
First you multiply the numerators (7 & 3) to get 21, then denominators (8 & 5) to get 40, unfortunately it cannot be reduced
In the scenario that it could be reduced, I was taught to cross reduce. lets say we had 2/8 x 4/6
You could divide by four for the 8 (denominator) and 4 (numerator) getting you 2/4 and 1/6
Then you do the same thing for 2 (numerator) and (6 denominator) so 2/2 is 1 and 6/2 is 3
Leaving you with 1/4 x 1/3 making it easier to multiply, and you don't have to reduce! Hope this helps!!