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Vipul invests a sum of ₹5400 and Vijay invests a sum of ₹9400 at the same rate of simple interest per annum. If, at the end of 5 years, Vijay gets ₹480 more interest than Vipul, then find the rate of interest per annum (in percentage).

A company offers a buy 2 get 1 free scheme on pens priced at ₹10 each. What is the effective discount percentage?

Akshay invests a sum of ₹5400 and Atul invests a sum of ₹9400 at the same rate of simple interest per annum. If, at the end of 6 years, Atul gets ₹360 more interest than Akshay, then find the rate of interest per annum (in percentage).

Bipin offers a discount scheme that on buying 7 notebooks, get 3 for free. What will be the sale price (in ₹) of a notebook with a marked price ₹185, if the equivalent percentage discount is applied?

Rupesh sold 153 chairs and had a gain equal to the selling price of 53 chairs. What is his profit percentage?

A number is first decreased by 15% and then increased by 20%. The number so obtained is 78 more than the original number. The original number is:

The expenditure of Sudha is $175\%$ more than her savings. If her expenditure decreases by 12% and savings increase by 40.5%, then by what percent does her income increase?

The price (per litre) of petrol increases by 85%. By what percent should its consumption be reduced such that the expenditure on it increases by 48% only ?

If $2\%$ of $x=348$, then $x$ is equal to:

The price (per litre) of petrol increases by 50%. By what percent should its consumption be reduced such that the expenditure on it increases by 14% only?

If 4% of $x$ is 132, then $x$ is equal to:

If 2% of x = 324, then x is equal to:

If 4% of x=24, then x is equal to:

The price (per litre) of petrol increases by 85%. By what percent should its consumption be reduced such that the expenditure on it increases by 11% only ?

There are 1224 employees in an organisation, out of which 25% are promoted. How many such employees are there who got promotion ?

A medicine has 60% substance S and $40\%$ substance $T$. If the cost price of S is increased from ₹30 to ₹40 per unit and the cost price of $T$ is decreased to ₹20 from ₹30 per unit, then the cost of the medicine will $\_\_\_\_$ by $\_\_\_\_$ %.

If 4% of $x=60$, then $x$ is equal to:

Two numbers, $m$ and $n$, are such that the sum of $4\%$ of $m$ and $6\%$ of $n$ is equal to half of the sum of 7% of m and $14\%$ of n . Determine the ratio of $m:n$.