Using a calculator performs some Operation and solving the problem. The calculator is a must in every place like accounting, schools, and hotels, etc. It is very helpful to schools and college students for calculating the sum. Many types of calculators are available like scientific calculators, modern calculators, pocket calculators. The calculator helps to sum, sub, div, multiplication, and also calculate it. That shows **how much to tip **. This percentage also performs well. In various ways, we can perform the calculation that all of the calculation is also done in the calculator itself so it’s reduce the time to solve the problem. Its size is tiny and small but its performance was very high. It is a portal and carries to every place. Keypad, LCD, battery, or solar cells are the components inside the calculator. It’s is very essential to improve your calculation skills so every person should use it. Casio, Flair, Orpat, Citizen, Deli, Caltrix are the major brands in India.

**Types of Calculator **

There are many types of calculators are Available which is following basic calculator, scientific calculator, Graphing Calculators, Financial Calculators, Printing Calculators. The basic calculator was used to calculate the simple calculations like addition, subtraction, multiplication, division, percentage calculation. The basic calculator has two types first is the pocket calculator and the second is a desktop calculator. LCD accepts only 8 to 12 digits. Scientific Calculators are used to performing high arithmetic and trigonometric calculation. It mainly used by higher education students. 240 and more Functions are performed by scientific Calculators. Graphing calculators are used to performing graphical calculations like plot the point in the graph. The display is quite big and it has some functions on a scientific calculator. Financial calculators are used to performing financial calculations. The printing calculator used to perform the basic calculation which is operated by a basic calculator but it has a printer to print the results.

**Tip Calculation **

In many countries, tip calculations were performed. In the United State, the tip calculation is very common and calculate everything and everyplace. Many people are living by express their vote of thanks by providing. Service is good their tip is calculated by 15% but their services are poor tip is calculated by 20% and their services are excellent tip is calculated by more than 20%. The tip is calculated in percentage. Tip calculations are used to sum of money and percentage calculation. Europe, Canada, Colombia, Africa, and the Middle East were Calculate the tip in different payments. To Calculate tip first step is to move the decimal point to left for example number is $6.375 means move the decimal point like $63.75. The second step is round up the amount like $6.40. And then the third step is to double up the amount like $12.80. Using the proportion and ratio to Calculate the tip and fraction also appear here. After the tip is added Calculate the total bill. Many place need to live separately but in many of the place add in the bill itself. Sometimes no need to give the tip. The tax also Calculate into the bill amount that will be calculated separately and then round up the bill amount. For tax calculation also perform by ratio and proportion. Tax also various to other countries like tip. This is the way to calculate the tip and tax and tip calculating is called gratuity.