Document page
mathematicsprinted 15 · PDF 16
165 pagesrevision 46935
printed 15 · PDF 16
Page image rendered from the stored file at 110 dpi; it sharpens as you zoom. Outlines are placed from each region’s stored position on the page (595 × 842 pt).
readable
Source of this text: embedded text layer. The better of the embedded text and OCR is kept.
15
Solved Past Paper Question:
Topic: Ratio and Proportion (1.11)
Major Terms and associated formulas:
Ratio:
It is a way of comparing one part of a whole with another.
Example: If a cake were sliced into 8 pieces, and shared in the ratio 6:2, this means
that person A receives 6 pieces, and person B receives 2 pieces.
Simplifying Ratio:
Let's consider the first given example.
The ratio is 6:2
We could also express this ratio as 3:1, even though we still have 8 pieces.
Both sides of the ratio have been divided by 2
The amount that each person gets relative to the other is still the same.
In this case, person A receives 3 times as much as person B.
Using Ratio to find fraction:
Let's consider the first given example.
The ratio is 6:2
Person A receives 6 pieces out of 8, or 6 / 8 of the cake
This could be simplified to of the pizza 3 / 4
Person B received 2 slices out of 8, or 2 / 8 of the cake
This could be simplified to 1 / 4 of the pizza.
Combining 2 ratios into 3-part ratios:
Example: A farm has 85 animals