Calculation of percentages
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Did you know ? A percentage is a hundredth of a whole. It is a way to express a part of a whole (ie a fraction) using a whole number. Writing e.g. "45%" ( 45 percent ) is actually just an abbreviation for the fraction 45/100, i.e. decimal number 0.45. The name comes from per cento, meaning (belonging to) a hundred.
Calculation of percentages
Percentage increase
Percentage change
Direct proportion
Indirect proportionality
Share in percentage
Profit from interest
Price without VAT
Price with VAT
Trade margin
Surcharge
Discount in percentage
Geometric calculations
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Did you know ? The oldest signs of geometry can be traced back to ancient Egypt. The Rind Papyrus describes a strikingly accurate method of calculating an approximation of Ludolf's number, with an error of less than one hundredth. The Rind papyrus also describes one of the first attempts at squaring the circle, as well as a certain cotangent analogy.
Center of the triangle
Angles of a triangle
Polygon
Cube
Cylinder
Ellipsoid
Pyramid
Sphere
Sphere segment
Block
Cone
Circular segment
Physics calculations
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Did you know ? Max Planck (1858-1947) - a German physicist who is known for his work in the field of quantum mechanics and the theory of quantization of electromagnetic radiation.
Newton's law of motion
Work done by a force
Kinetic energy
Gravitational field
Conservation of momentum
Newton's second law
Oscilating object
Law of Gravity
Snell's law of refraction
Electric potential
Ohm's law
Coulomb's law
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