ScholarNET | Online Learning

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Demonstration Pages for both JuniorMathsOnline and SeniorMathsOnline

Percentages - example of notes with interactive tutorials.
Transformations - animations of the common transformations of reflections, rotation, translation and enlargement.
Vectors - notes including a simulation and a game.
Trigonometry - simulation showing the sine as a circular function.
Solid Shapes - pop-up windows describing various shapes.
Algebra Crossnumber - learning algebra through crosswords.
Expressions Test - one of the 355 multiple-choice topic tests.

Volume and Surface Area - example of topic notes with activities.
Geometric Series - notes with sequence and series generator.
Simultaneous Equations - 3D equations of simultaneous equations with three variables.
Bivariate Data - one of the many statistical topics.
Circles and Ellipses - topic notes with clear and precise diagrams of functions and graphs.
Trigonometrical Graphs - transformations of y = sine x.
Gradient Function - animated illustrations of the concept of the gradient of curves.

For a full list of each year's topics click the appropriate link below:

Percentages

A percentage is a way of writing a fraction with a denominator of 100.

Percentage means "out of 100" or "per hundred"

Calculations involving percentages often require multiplication or division by 100.

x percent, written x%, means (or x parts out of 100)

Examples	Answers
Write 40% as a fraction
Write the fraction as a percentage	70%

Percentage Calculations

Below are some of the types of problem that use percentages.

Percentage of a quantity:

To find x percent of a quantity. Calculate: x (the quantity)

Example	Answer
Find 8% of 300

For more practice with these percentages

One quantity as a percentage of another quantity:

To find a out of b as a percentage. Calculate:

Example	Answer
Write 13 out of 20 as a percentage.

For more practice with these percentages -

Increasing a quantity by a percentage:

To increase a quantity by x percent. Calculate:

Example	Answer
Increase 50 by 8%

For more practice with these percentages -

Decreasing a quantity by a percentage:

To decrease a quantity by x percent. Calculate:

Example	Answers
Decrease 50 by 8%

For more practice with these percentages -