Mayank Bomb explains the concept of percentage in a simple and lucid manner.

Relative Quantities- Fractions, Rations & Percent

Addition & subtraction

Key Ideas

1. Fractions, ratios, and percent- relative quantities

2. Relative quantities and absolute quantities are not to be mixed.

3. Relative quantities can be added or subtracted

4. x represents the unknown in the relative quantity.

What percent is 60 of 240?

25

Find sales tax @ 20% from a gross figure of Rs. 1600?

320

If 50% of (x-y) = 30% of (x+y), then what percent of x is y

25%

If 10% of a number is added with itself then result becomes 1331. Find the original number.

1210

60% of a number is 360. What is 99 % of the same number?

594

If 15% of a number is subtracted from itself then result becomes 2550. Find the original number.

3000

If 39 is added in a number, it becomes 113 % of itself. Find the number.

339

A house sold for 357000 dollars, produces a profit of 19%, find the profit?

57,000

40% of 70 is what % more than 30% of 80?

16.66%

A fruit seller had some apples. He sells 40% apples and still has 420 apples. Originally, he had?

700

If A = X% of Y and B = Y% of X, then

A number exceeds 20% of itself by 40. Find the number?

50

A man multiplied a number by 7/4 instead of 3/5. What is % error?

19.16%

The total salary of A and B is Rs. 1500. A spent 90% of his income and B spent 80% of his income. The ratio of saving is 3:4. Find the ratio of their salary. What is their absolute salary?

3:2 or 900:600

If A exceeds B by 40%, B is less than C by 20%, then A:C is

28:25

Next Class: % Change, Income & Consumption

The price of sugar decreases by 30%. By what % the consumption should increase so that expenditure decreases only by 10%?

A man spends Rs. 5700 from his income of Rs. 8550. If his income and expenditure are increased by 19% and 13%. Find the % change in saving?

This video will be useful for students preparing for entrance exams like JEE, SAT, ACT, GATE, GMAT, GRE.

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Thanks a lot sir .

very nice video sir , thanks for the guidance