The percent of increase or decrease is the measure of percent change. It is commonly calculated to find how much something has changed, like finding a pay increase or discovering how grocery bills have climbed from one trip to the next. The calculations are relatively straight forward but easily forgotten…

## Easy to Use Percentage Calculators

The following calculators offer automatic answers for a number of common percentage questions.

# Basic Percent Calculator – Finding Percentages of Known Numbers

A common practice after an evening meal at a fine restaurant is to calculate the tip for the waiter or waitress. Based on how well we liked the service, we come up with a gratuity that’s usually based on a percentage of the bill. The Basic Percent Calculator finds the percentage of a known amount, just like how you would in calculating a tip…

# Percent to Decimal Conversion Calculator

Converting a percent to decimal is so easy that you don’t need a calculator to do it, although the one here certainly will. To perform the conversion, just move the decimal point 2 places to the left and remove the percent (%) sign. Math doesn’t get any simpler than that…

# Converting a Number to a Percent

Percent, an abbreviation of per centum meaning per hundred, is how we express a number as a fraction of 100. Some of us use percentages daily, whether in mathematics or engineering fields or calculating what to tip the waiter or waitress after eating out. The basics are pretty simple, really…

# Gratuity or Tip Calculator

The Gratuity or Tip Calculator extends the formula used by the Basic Percent Calculator which finds the percentage of a known amount. The extra calculations include adjusting for variables like the number of people and calculating tips splits and totals…