Percentage calculator

Complete the row that represents your percentage problem.

Enter the values in a row and click Calculate.

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:

• Stamps collection
  Together, Peter and Jan had 52,000 stamps in their collection. To compete with their friend, they must have 56700 stamps. They agreed that Peter would increase his collection by 8 percent and Jan would give 10 percent more than he has. How many stamps did
• Sphere fall
  How much percent fall volume of a sphere if the diameter decreases 3×?
• Efficiency
  A certain device consumes 50 kW and delivers 17 kW. Find its efficiency.
• Fertilizer
  Mr. Gherkin uses for fertilization 7% solution of fertilizer. 9 liters of it still left. How much water must be added to the solution to make only the 4% solution?
• Unions
  Calculate how much money per year would go to the treasury of unions if 976 thousand employees join unions with an average net salary of 587 euros and if union membership costs 1% of the net monthly salary.
• Ethnicity
  The share of ethnicity XY is 26%, which is 1/9 more than in the prewar period. What was the share of that ethnicity in the prewar period?
• New refrigerator
  The new refrigerator sells for 836 Euro. Monday will be 25% discount. How much will Euro save, and what will be the price?
• Outstanding 5054
  I have CZK 6,155, and I need to divide it as a percentage into two outstanding amounts: CZK 12,000 and CZK 35,000. How much money will I send to each of them? Thank you for your answer.
• UV radiation
  The glass of 1 mm thickness absorbs 5.3% of UV radiation passing through. How many percent of UV rays absorb glass with a thickness of 2.3 cm, made from 1 mm thick those glasses?
• Apartments
  The apartment on the first floor was 10% more expensive than the same apartment on the second floor. The difference was 105 Kc annually. Calculate the apartment's annual rent on the first floor and from the apartment on the second floor.
• Obtained 2812
  45% of pig iron is obtained from iron ore, and 70% of steel from it. How much steel is made from 100 tons of iron ore?
• Percent
  Calculate how much % is the number 26.25 less than the number 105.
• Surface of a cube
  The cube's edge, the volume of which is 58.3% of its surface, is: a) 3.5cm b) 4.5cm c) 2.5cm d) 1.5cm
• Hectoliters 3382
  The block tank held 288 hectoliters of water. The bottom dimensions are 12m and 6m, and the depth is 2m. What percent of the tank volume does the water occupy?
• Contains 3534
  Iron ore contains an average of 35% iron. How much iron is obtained by melting 300 tons of iron ore?

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