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 ? Eukleides of Alexandria, most commonly known as Euclid, was an ancient Greek mathematician. We know little about Euclid's life. There is an opinion that he lived during the time of Ptolemy I. and perhaps he laid the foundations of mathematical research in the Alexandrian Museion. Euclid studied at the Platonic Academy in Athens and later worked in Alexandria.
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 ? Physics is very important in many fields such as technology, medicine, cosmology, engineering and many others. Without physics, we wouldn't be able to understand how electrical devices, spaceships, or medical devices work, and we wouldn't even be able to explain how light, sound, or the gravitational field are created.
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
TOP SCIENTISTS AND INVENTORS
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