Suppose we have to find 34 percent of 200. Of in maths means multiply and percent means per century or per 100. So 34 percent of 200=(34/100) ×200 =34×200/100 =34×2 =68. So 34%of 200=68

Percentage Formulas

Introduction
Percentages are used to express a fraction or a portion of a whole quantity. They are widely used in various fields such as mathematics, finance, statistics, and everyday life. Understanding and using percentage formulas is essential for calculations involving percentages.

Basic Percentage Formula
The basic percentage formula is used to find a percentage of a given quantity. It is represented as:

Percentage = (Part/Whole) × 100

- "Percentage" refers to the value or portion of the whole quantity expressed as a percentage.
- "Part" represents the specific quantity or value that is being considered.
- "Whole" refers to the total or entire quantity.

Example:
If there are 40 blue marbles out of a total of 100 marbles, the percentage of blue marbles can be calculated as follows:

Percentage = (40/100) × 100
= 40%

The result indicates that 40% of the marbles are blue.

Percentage Increase Formula
The percentage increase formula is used to calculate the increase in a value from the original value. It can be expressed as:

Percentage Increase = [(New Value - Original Value)/Original Value] × 100

- "Percentage Increase" represents the increase in value expressed as a percentage.
- "New Value" refers to the updated or increased value.
- "Original Value" represents the initial or starting value.

Example:
If the original price of a product is $50 and it increases to $60, the percentage increase can be calculated as follows:

Percentage Increase = [(60 - 50)/50] × 100
= 20%

The result indicates that the price has increased by 20%.

Percentage Decrease Formula
The percentage decrease formula is used to calculate the decrease in a value from the original value. It can be expressed as:

Percentage Decrease = [(Original Value - New Value)/Original Value] × 100

- "Percentage Decrease" represents the decrease in value expressed as a percentage.
- "Original Value" refers to the initial or starting value.
- "New Value" represents the updated or decreased value.

Example:
If the original quantity of a product is 200 and it decreases to 150, the percentage decrease can be calculated as follows:

Percentage Decrease = [(200 - 150)/200] × 100
= 25%

The result indicates that the quantity has decreased by 25%.

Conclusion
Understanding and applying percentage formulas is important for various calculations. Whether it's finding a percentage of a quantity, calculating percentage increase, or determining percentage decrease, these formulas provide a systematic approach to solving percentage-related problems. By using these formulas, you can perform accurate calculations and make informed decisions in different scenarios.