Commercial Mathematics

Express $\frac{1}{20}$ as a percentage.

Calculate $5\%$ of $200$ liters.

Find the Principal if the simple interest is ₹$60$, the rate is $10\%$ p.a., and time is $1$ year.

Find the simple interest for Principal = ₹$4,000$, Rate = $5\%$, and Time = $1$ year.

In a library, $20\%$ of the books are in Hindi and $25\%$ of the remaining books are in English. If the remaining $1,200$ books are in regional languages, find the total number of books in the library.

Calculate $0.5\%$ of $2,000$.

A toy is bought for $₹150$ and sold for $₹180$. Calculate the profit percentage.

A man buys oranges at the rate of $5$ for $₹10$ and sells them at the rate of $4$ for $₹10$. Find his gain percentage.

A sum of money becomes $\frac{7}{6}$ of itself in $3$ years at simple interest. Find the rate of interest per annum.

If the side of a square is increased by $25\%$, then its area is increased by:

An electric kettle is bought for $₹1,200$ and sold at a loss of $₹120$. What is the selling price?

A bed sheet is bought for $₹700$ and sold at a profit of $₹140$. Find the selling price.

A wallet is bought for $₹500$ and sold for $₹400$. Find the loss percentage.

A silver ring is purchased for $₹4,000$ and sold for $₹5,000$. What is the profit percentage?

A dealer purchased $50$ dozen bananas for $₹1,250$. He sold them at $₹35$ per dozen. Find his gain or loss percent.

What is the profit or loss percentage if an article costing $₹80$ is sold for $₹100$?

A shopkeeper bought $25$ kg of rice for $₹1,500$. He sold it at a loss of $₹5$ per kg. Find his total selling price.

A dealer sells goods at $10\%$ loss on cost price but uses a weight of $800$ grams for a kilogram. What is his real profit or loss percentage?

A shopkeeper bought $500$ notebooks and sold them at the rate of $₹ 20$ each. If he made a profit of $25\%$, what was the total cost price of all the notebooks?

Profit after selling an article for $₹ 425$ is the same as loss after selling it for $₹ 355$. What is the cost price of the article?

Find the time period for a principal of $₹1,000$ to earn $₹150$ interest at $5\%$ per annum.

Determine the rate of interest per annum if $₹1,200$ yields $₹144$ simple interest in $4$ years.

If the principal is $₹5,000$ and the simple interest is $₹1,250$, find the total amount.

Find the principal which yields a simple interest of $₹12$ in $2$ years at $2\%$ per annum.

What principal amounts to $₹1,120$ in $3$ years at $4\%$ per annum simple interest?

Find the simple interest on $₹9,600$ at $5 \frac{1}{2}\%$ per annum for $2$ years.

Find the time in which $₹5,000$ at $4\%$ per annum simple interest will produce the same interest as $₹4,000$ at $5\%$ per annum for $2$ years.

A sum of money double itself in $5$ years. In how many years will it become $10$ times itself at the same rate of simple interest?

Find the time in which ₹$2,000$ will amount to ₹$2,330$ at $11\%$ per annum simple interest.

If the amount of ₹$2,500$ at simple interest for $3$ years is ₹$3,100$, what would the amount be if the rate of interest is increased by $2\%$?