What is the Percentage formula for finding the part given the whole?

The formula to find the Part is: 
For Example, If you want to find 30% of 200, you calculate: 

How do you calculate the percentage decrease?

To calculate the percentage decrease, use the formula: 
Percentage Decrease = Where,
OV - Old Value
NV - New Value

What is the formula for finding the percentage increase?

To find the percentage increase, use the formula: 
Percentage Increase = 

Where,
NV - New Value
OV - Old Value

If an item costs ₹80 and is marked up by 15%, what is the new price? 

(Hint: First, find 15% of ₹80)

First, calculate the markup: 

Add the markup to the original price:

A student scored 45 out of 60 on a test. What is their percentage score?

(Hint: Use the percentage formula for part over whole)

What is the relationship between percentage, fractions, and decimals?

Percentages can be converted to fractions and decimals. 
To convert a percentage to a decimal, divide by 100. 
To convert it to a fraction, place the percentage over 100 and simplify. 
For Example, 
25% = 25 / 100 = 0.25

If a product is sold for ₹120 after a 20% discount, what was its original price? 

(Hint: Use the relationship between the sale price and the discount)

What is the concept of percentage change?

Percentage change measures how much a quantity has increased or decreased relative to its original value, expressed as a percentage. The formula is:

Where,
NV= New Value
OV = Old Value

What is the formula for calculating the percentage of a number?

The formula is: Where ,
P = Percentage we want to find
N -  Number. 
For example, to find 20% of 150: 

What is a quick way to find 10% of any number?

To find 10% of a number, simply divide the number by 10. For Example, 
10% of 250 = 
250 / 10 
= 25.

If a laptop is priced at ₹800 and is on a 20% discount, what is the sale price?

(Hint: Calculate the discount amount first)

First, find the discount:  Then, subtract the discount from the original price:

A company's revenue increased from ₹50,000 to ₹65,000. What is the percentage increase in revenue?

(Hint: Use the formula for percentage increase)

How do you convert a percentage to a decimal?

To convert a percentage to a decimal, divide the percentage by 100. For example, 25% as a decimal is 25 / 100 = 0.25.

What is the relationship between percentages and fractions?

Percentages represent a fraction of 100. 
For Example, 
50% is equivalent to 50/100 or 1/2.

If a product costs ₹120 and its price is increased by 15%, what is the new price?

(Hint: Calculate the increase amount and add it to the original price)

First, find 15% of ₹120:  Then, add the increase to the original price: