The number of Roberto's baseball cards is 3/4 the number of David's cards. If Roberto gives 1/2 of his cards to David, what will be the ratio of Roberto's cards to David's cards?

8 answers

r = 3d/4, or 4r = 3d

r/2 / (3d/4 + r/2) = 2r/(3d+2r) = 2r/6r = 1/3

check:

If Roberto has 12 cards, David has 16
After Robert gives David 6,

6/18 = 1/3

the number of roberto's baseball cards is 3/4 the number of david's cards. if roberto gives 1/2 of his cards to david, what will be the ratio of roberto's cards to david's cards?

steve, you are wrong,when Roberto gives half of 12to David he will have 6 and david will have 22 so the ratio is 3:11

phoebe u better be right

Is phoebe right

Is Phoebe right??

Yes Phoebe is right

Why is math so hard :(