Why didn't I get this SAT Math question right? Help?

5am6996
Wed, 29 Aug 2012 16:37:58 +0000

Your answer was .5625, close to 3/6 which is one half. I can’t tell what working you did but I can see that you labeled QS 3 and SV 9, which is where you made a mistake. If you had to use those proportions, QS would be 3 and SV would be 6 because it’s QS/QV not QS/SV, in which case you would use 3 and 9. Since it’s QS/QV, QV has to be QS+SV which has to equal 3 times QS. Again, I can’t tell if this is what you did but if it is, then that’s your error!