Percentage
Practice Questions on Percentage
|
Q11) A number is first increased by 30%, then decreased by 50% and then increased by 20%. Find the percentage change in the number? 1) Increased by 12% 2) No change 3) Increased by 22% 4) Decreased by 22% Solution: Suppose the number is 100.  Percentage change  Negative sign indicates that number is reduced. Hence, option 4. Q12) Price of an article increased by 20% and it's consumption is reduced by 10%. Find the percentage change in revenue? 1) Increase of 10% 2) Decrease of 12% 3) Increase of 8% 4) Decrease of 10% Solution: Let p be the price of the article and q be the quantity consumed. Revenue_initial = pq = 100 Revenue_new = (1.2p)(0.9q) = 1.08pq = 108 Hence, revenue is increased by 8%. Hence, option 3. Q13) If the numerator of a fraction is diminished by 12% and the denominator is increased by 32% then the fraction becomes 5/6. Find the original fraction? 1) 5/4 2) 3/4 3) 7/4 4) None of these Solution: Let the original fraction be   Hence, option 1. Q14) A fruit seller had some apples. He sold 40% of the apples and still has 432 apples. How many apples did he have in the begining. 1) 720 2) 1080 3) 648 4) 960 Solution: Say originally the fruit seller had y apples. After selling 40% of the apples he is left with 60% of the apples. So, 60% of y = 432 On solving, y = 720. Hence, option 1. |
