Percentage Calculator calculator

Complete the row that represents your percentage problem.

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We know three variables from school: percentage (p), percentage part (c) and base (z). They are connected by the formula

What is % of ?
is what percent of ?
is % of what?
The fraction / is what percent?
% increase of is
% decrease of is
% is what fraction/number?
What is the percentage increase/decrease from to ?
Climb/descent of % is what angle in degrees?
Climb/descent of degrees is what percent?
If a goods sells for after a % markdown, what was its original price?

What is a percentage?

A percentage is a ratio whose second term is always 100. The term "percent" means parts per hundred. It originates from the Latin phrase per centum, which translates to "per hundred." In mathematics, the symbol % is used to denote percentages, and it can also be abbreviated as pct.
For example, 12% (read as 'twelve percent') is equivalent to:

• The fraction 12/100,
• The simplified fraction 3/25, or
• The decimal 0.12.

Percentages are commonly used to express how large or small one quantity is relative to another. They provide a standardized way to compare proportions and understand relationships between quantities.

Percentage in word problems:

• Date game
  Let now is Tuesday. What day is after 229 days? Write the result as a number: 1=Monday, 2=Tuesday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday, 7=Sunday.
• Divisibility
  Determine all divisors of a number 91.
• Acids
  64% acid is made from the same acid of two different concentrations. The amount of weaker acid to the stronger acid is in the ratio 2:1. What was the concentration of the weaker acid if the stronger had 98% concentration?
• Sugar
  The sugar factory produced 180.6 tons of sugar in 1 day at 14% sugar content. How many tons of pure beet sugar factory processed in 1 day?
• Car value
  The car loses value by 15% every year. Determine a time (in years) when its price will halve.
• Class
  In the 7 C class, there are ten girls and 20 boys. Yesterday, 20% of girls and 50% of boys were absent. What percentage of students were absent?
• The tent
  The tent shape of a regular quadrilateral pyramid has a base edge length of a = 2 m and a height of v = 1.8 m. If we have to add 7% of the seams, how many m² of cloth did we need to make the tent? How many m³ of air will be in the tent?
• Percents - easy
  How many percent is 432 out of 434?
• Number value
  25% of the number x equals 2^-1. What is the value of x?
• Number calculation
  Specify a number that is 61% less than 10².
• Coconut percentage
  The bar contains 81g of coconut per 200g. What percentage of coconut does the bar have?
• Interest rate
  At what annual interest rate would we get an interest of 60 euros on a deposit of € 6,000 for three months?
• Salt solution
  How many grams of table salt and water do we weigh to prepare 500 g of a 15% solution?
• Pesos
  What amount increased by 20% will equal P60?
• New bicycle
  Mr. Milan bought a new bicycle. The Milan he chose was out of stock, so he had to order it. When ordering, he paid a deposit of 110 euros, which is 40% of the total price. How many euros did Mr. Milan's bike cost?

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