Who say’s mathematics is not useful in real life, mathematics is quite important thing in our life , and mathematics is everywhere , never think that the mathematics which you studied in school is not useful .

Today we are going to understand 10 basic mathematical formula and their use in real life :

1. Percentage (%):
   • Formula: percentage = (part / whole) * 100
   • Use in Daily Life:
     • Calculating discounts or sales tax: Say a shirt costs $20 and has a 10% discount. Discount amount = (10/100) * $20 = $2. New price = $20 – $2 = $18.
     • Tipping at restaurants: You can decide a customary tip percentage (e.g., 15%) based on the bill amount to show appreciation for service.
     • Battery level: Your phone might display the battery level as a percentage, indicating the remaining capacity compared to its full charge.
2. Unit Price:
   • Formula: unit price = total price / quantity
   • Use in Daily Life:
     • Comparing prices at grocery stores: You can calculate the unit price (price per item) to see which option is more economical. For example, a box of cereal might be $4.50 for 18 oz, while another brand is $5.00 for 24 oz. Calculating the unit price per ounce will help you choose the better value.
3. Simple Interest (SI):
   • Formula: SI = (principal * rate * time) / 100
   • Use in Daily Life:
     • Earning interest on savings accounts: Banks offer a simple interest rate on your savings. The formula helps calculate the interest earned based on the principal amount (initial deposit), interest rate (e.g., 2% per year), and time period (e.g., 1 year).
4. Area of a Rectangle:
   • Formula: area = length * width
   • Use in Daily Life:
     • Planning furniture placement: Knowing the area of your room (length multiplied by width) helps determine if furniture will fit comfortably.
     • Calculating paint or wallpaper needed: You can estimate the amount of paint or wallpaper required to cover a rectangular wall by calculating its area.
5. Distance Formula:
   • Formula: distance = √((x2 - x1)² + (y2 - y1)²) (applicable to points on a coordinate plane)
   • Use in Daily Life:
     • Estimating travel distance on a map: You can measure the coordinates of two locations on a map and use the formula to estimate the straight-line distance between them (actual road distance might differ).
6. Average:
   • Formula: average = (sum of values) / number of values
   • Use in Daily Life:
     • Calculating test scores: Finding the average of your test scores across multiple exams gives you an overall idea of your performance.
     • Tracking your budget: You can calculate the average amount you spend on groceries each week or month to monitor your spending habits.
7. Perimeter of a Rectangle:
   • Formula: perimeter = 2 * (length + width)
   • Use in Daily Life:
     • Fencing a rectangular garden: Knowing the perimeter helps determine the amount of fencing material needed to enclose the garden.
     • Running or walking around a rectangular park: The perimeter represents the total distance you’ll cover if you run or walk around the entire park.
8. Celsius to Fahrenheit Conversion:
   • Formula: °F = (°C x 9/5) + 32
   • Use in Daily Life:
     • Weather forecasts: Weather reports might use Celsius, but you can convert it to Fahrenheit for easier understanding based on your preference.
     • Cooking recipes: Some recipes might provide temperatures in Celsius, and you can use the formula to convert them to Fahrenheit for your oven setting.
9. Pythagorean Theorem:
   • Formula: a² + b² = c² (where a and b are the lengths of the shorter sides, and c is the length of the hypotenuse in a right triangle)
   • Use in Daily Life:
     • Carpentry or DIY projects: The Pythagorean theorem helps ensure right angles when building shelves, installing cabinets, or creating other structures with right angles.
10. Rate (Speed):

• Formula: rate = distance / time
• Use in Daily Life:
  • Calculating your average speed while driving: You can measure the distance traveled (e.g., from odometer readings) and divide it by the travel time to find your average speed.
  • Estimating cooking times: Recipes might provide cooking times based on a certain oven temperature. You can adjust the cooking time if your oven runs hotter or colder by considering the rate of cooking (how quickly the food cooks) based on the temperature.

Happy Learning ..