## Introduction

Mathematics is a fundamental subject that helps us make sense of the world around us. One of the most basic mathematical concepts is division, which involves splitting a number into equal parts. In this article, we will explore the simple division problem of 90 divided by 2 and its significance in our daily lives.

## The Basics of Division

Division is the inverse operation of multiplication. It involves dividing a number into equal parts or groups. In the case of 90 divided by 2, we are trying to find out how many groups of 2 are needed to make up 90.

### The Quotient

The answer to a division problem is called the quotient. In the case of 90 divided by 2, the quotient is 45. This means that we need 45 groups of 2 to make up 90.

### The Remainder

When we divide a number, there may be a remainder. In the case of 90 divided by 2, there is no remainder because 90 is evenly divisible by 2. However, if we were dividing 91 by 2, the quotient would be 45 with a remainder of 1.

## Real-World Applications

Division is used in many real-world applications. For example, if you are planning a party and you have 90 guests, you can use division to figure out how many tables you will need. If each table can seat 6 guests, you will need 15 tables.

### Division in Business

Division is also used in business to calculate profits, costs, and prices. For example, if a company has $90,000 in profits and wants to divide it equally among 2 shareholders, each shareholder would receive $45,000.

### Division in Science

Division is also used in science to calculate rates and ratios. For example, if a car travels 90 miles in 2 hours, its speed can be calculated by dividing 90 by 2, which gives a speed of 45 miles per hour.

## Related Concepts

Division is closely related to other mathematical concepts such as multiplication, fractions, and decimals.

### Multiplication

Multiplication is the inverse operation of division. If we know that 2 groups of 45 make 90, we can use multiplication to find out that 45 multiplied by 2 equals 90.

### Fractions

Fractions are another way of expressing division. For example, 1/2 is the same as dividing a number by 2. To find out how many 1/2 cups are in 90 cups, we can divide 90 by 1/2, which gives 180.

### Decimals

Decimals are a way of expressing division with a remainder. For example, if we divide 90 by 3, we get a quotient of 30 and a remainder of 0. However, if we divide 91 by 3, we get a quotient of 30 and a remainder of 1, which can be expressed as a decimal as 30.33.

## Conclusion

Division is a fundamental mathematical concept that is used in many real-world applications. Understanding the basics of division, such as 90 divided by 2, can help us solve everyday problems and make sense of the world around us.

### Further Reading

If you want to learn more about division and its applications, check out these resources: