Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Download
Effects of Percentage Change
406 plays

More
A common kind of problem found in many aptitude sets, which quite often confuse the students. Understanding the problem and cracking it within seconds.

Niteesh Srivastava
Love Music, the necessity of life!! Puzzle and Chess enthusiast. I believe you can achieve anything if you set your mind on it!!

U
Unacademy user
"Devrais (Scared grove)" is located in the 'Western ghats' which is a globally recognised 'hot spot' for bio diversity in India.
superb .. good answer...
Aarthi A
a year ago
Thank you so much, Sir.
thnkyew so much sir!!cn u help tell me frm where to practice these questnz
  1. EFFECTS OF PERCENTAGE CHANGE Short Tricks and Questions


  2. Percent ia e s 2alasy mese than If A's Salary is 20 % more than B's salary, than how much percent is B's salary less than A's salary? , than how much Amar has 33.33% more coins than Bharath, by how much percent is Bharath's coin less than that of Amar? Height of Ais 50% greater than B, how much is B's height less than that of A? Due to Amar's bad habits his father reduced his pocket money by 20%, but after few days it got increased to original. What was the increase percentage?


  3. If there is an X% increase in value of P over Q, then the decrease in value of Q in respect to P will be x/100+x For example: A's salary is 20% more than B, than how much is B's salary less than A? Lets assume that B's salary is 100, than A's salary will be? = 100 + 20% of 100 or = 100+ 1 /5 of 100 = 120 Now, How much percent is B's salary less from that of A's? => x was 20%. => 20/100+20 = 20/I 20 or


  4. Short Method X percent increase will be X/100+X decrease to get back to that value Xarercent increase will be X/100-x decrease to get back to that 20% increase will be 1/5+1= 1 /6 decrease 33.33% increase will be 1/3+1 = 1/4 decrease We are adding the numerator to the denominator to get our value!! 1/8 will be 1/9 1/2 will be 1/3


  5. If A's Salary is 40 % more than B's salary, than how much percent is B's salary less than A's salary? 40% = 215. therefore decrease in B's salary in respect to A will be 28.56% (2/7) Solution: B= 1 00 A= 140 B as a % of A= 100/140-5/7 = 71.42% Lesser by 28.56%


  6. Amar has 33.33% more coins than Bharath has, by how much percent is Bharath's coin less than that of Amar? 33.33% is 1 /3 therefore, Bharath's coins in respect to Amar's coins will be 1 /4 % less. , Solution B-100 A=133.33 B as a percentage of A= (1 = 100/133.33 = 75% hoo e cgeofA- (100.133.33)/133,33 00-133.33)133.33 Lesser by 25%


  7. Due to Amar's bad habits his father reduced his pocket money by 20%, but after few days it got increased to original. What was the increase percentage? = 20% i.e 1/5 is already increase Therefore, you will have to subtract 20% from denominator. 1 / 5-1 = 1 /4 = 25%. Solution, let original pocket money be 100 after deduction of 20% = 80 when it increase back to 100, increase will be 20/80-1/4 = 25%