My previous actual GMAT Quant score was 43 (71%). How much i have to push further, in term of correction rate (or getting number of questions correct), to achieve 47 (80%)?

Nauman

no simple answer to this question. the test scoring algorithm is adaptive, meaning that it doesn't depend solely on the number of problems that you get right. rather, it's a function of the difficulty of the problems that you get right vs. the difficulty of the problems that you get wrong, inter alia.
there's really no simple explanation of the adaptive testing algorithm. but you can rest assured that, if you can consistently get more difficult problems correct, then you'll be able to move your score up to the desired goal.

in any case, you SHOULD NOT be thinking about these sorts of things while you're taking the test. in other words, evenr if we could specify the exact number of additional problems you'd need to get right to get the score you want, that information wouldn't be of any use to you, since you wouldn't be able to use it for any purpose during the exam. (if you thought about this information while taking the test, you'd just get distracted, and would probably score lower because of the resultant lack of concentration.)

i have moved this question to the general folder where it belongs.