Understanding Percentages: Definitions, Interpretation, and Applications
Dive into the world of percentages by defining them as parts per hundred, interpreting diagrams as percentages, exploring the historical significance of the number "hundred," and engaging in activities to strengthen your understanding of percentages.
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I, II, III, IV, V, XCIX, C Today we are learning how to: Define percentage as number of parts per hundred Interpret diagrams as percentages and vice versa
STARTER DRILL Think of as many words as you can that relate to one hundred . In how many different instances has the word hundred been used in historical events?
STARTER DRILL Possible examples: Centenary Century Centimetre Centennial Hundredth Late Old English, from hund hundred (from an Indo-European root shared with Latin centum and Greek hekaton ) + a second element meaning number ; of Germanic origin and related to Dutch honderd and German hundert . The noun sense subdivision of a county is of uncertain origin: it may originally have been equivalent to a hundred hides of land. Meaning "division of a county or shire with its own court" (still in some British place names and U.S. state of Delaware) was in Old English and probably represents 100 hides of land. The Hundred Years War (which ran intermittently from 1337 to 1453) was first so called in 1874. The original Hundred Days was the period between Napoleon's restoration and his final abdication in 1815.
MAKE YOU THINK! I m not a hundred percent sure about some of those facts What does this mean?
Confidence builder Percent means out of 100.
Confidence builder What percentage of this shape is shaded?
Confidence builder What percentage of this shape is shaded?
Confidence builder What percentage of this shape is shaded?
Confidence builder What percentage of this shape is shaded?
Confidence builder What percentage of this shape is shaded?
SHOW YOUR STRENGTH Using your 2 grids, in what ways can you shade 24%?
CHALLENGE THE MISCONCEPTION Barbara believes that all of the following diagrams represent 10%. Is she right and why?
25% = 50% = 10% = 20% =
CREATIVE TIME You have been employed as a designer. You need to create a grid drawing like those below. You need to cover 80% of the diagram exactly with some kind of design. Any more or any less and you are fired!
MAKE IT HARDER! I have lost some tiles. Each of the following diagrams represent 80% of the original number of tiles. How many were there in the original patterns?
STRETCH Which diagram has the greatest amount shaded? How can you prove your answer without any questioning your understanding? How does today s lesson help prove it?
