Easily Calculating 20%

• 1). Take a look at your bill after your meal is finished. Take the grand total and multiply it by 2. (If the bill is 100: 100.00 x 2 = 200.00)
  
  
• 2). Take that number and move the decimal point to the left one number. (200.00 = 20.00)
  
  
• 3). Leave the appropriate amount. You have now calculated 20%. Use this as a starting point for deciding the exact percentage you will leave.