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primary 6 | Maths
| Percentage
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Need some help
Date Posted: 6 months ago
Views: 88
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Hope this helps
Date Posted:
6 months ago
Thanks, but do you mind to explain the units part? How come it became 4/20 and 4/5 part. Which leads to 25 units. Abit confuse on that
When he reduce spending by 20%, the saving increased by 80%,
That mean the spending amount, 20% is the same amount that cause saving to increased 80%.
20% = ⅕
80% = ⅘
For the same amount, make numerator to the same which is 4/20 and 4/5.
If you draw model, spending = 20 unit and saving = 5 unit.
20% of 20u = 4u
80% of 5u = 4u
That mean the spending amount, 20% is the same amount that cause saving to increased 80%.
20% = ⅕
80% = ⅘
For the same amount, make numerator to the same which is 4/20 and 4/5.
If you draw model, spending = 20 unit and saving = 5 unit.
20% of 20u = 4u
80% of 5u = 4u
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