Question

veronica's mom left 3/4 of a cake on the table.Her brothers ate 1/2 of it. what fraction of the cake did the eat?

Answer 1

Since the fraction of the eaten cake is 1/2, you can multiply the numerator and denominator by and get an equivalent fraction, which is 2/4.
(BTW, 1/4 of cake would be left over) 

Answer 2

 convert 1/2 to 2/4 <<<<< that is the amount the brothers ate