Explanation:
2/4*4/8 can be simplified to 1/2*1/2, the product of which is 1/4! Multiply the numerators by each other and the denominators by each other. 1*1 is 1 and 2*2 is 4.
Remember that a fraction multiplied by another fraction is like dividing, the product will get smaller.
Multiplying something by 1/2 for example is like dividing by 2.
Hope this helped!