IN GENERAL WE WRITE x% OF 1512=683
SO X /100 .1512=683
X= 683 X 100/1512
HERE CALCULATION PART IS VERY DIFFICULT
SO EASY METHOD IS......
IN 683/1512 TAKE 10% OF DENOMINATOR THAT IS151.2 ,SEE IT DIVIDES THE NUMERATOR HOW MANY TIMES. HERE IT DIVIDES THE NUMERATOR 4 TIMES SO ANSWER IS IN FORTIES( i.e ANS IS BETWEEN 40%TO 50%
THIS KIND OF SHORT CUTS ARE VERY USEFUL FOR GMAT, CAT &OTHER COMPETITIVE EXAMS.
IF THERE IS ONLY ONE OPTION BETWEEN 40% &50% THEN IT IS THE CORRECT ANSWER. IF MORE THAN ONE OPTION BETWEEN 40% & 50% ,THEN WE TAKE 1% OF DENOMINATOR AND SEE IT DIVIDES THE NUMERATOR H0W MANY TIMES.IN THE ABOVE EXAMPLE
10% OF DENOMINATOR IS 151.2 SAY APPROXIMATELY 151 DIVIDES THE NUMERATOR 4 TIMES. 151X4=604. AND THE REMAINDER IS 79 .NOW 1% OF DENOMINATOR (=15.12 SAY APPROXIMATELY 15 DIVIDES THE REMAINDER 5 TIMES. SO 45% IS THE ANSWER.
