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primary 6 | Maths | Ratio
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Jody Wong
Jody Wong

primary 6 chevron_right Maths chevron_right Ratio chevron_right Singapore

Please help to answer this question on ratio. Thank you.

Date Posted: 5 years ago
Views: 285
snell
Snell
5 years ago
children: 7u
balloons: 23u

guess & check:
children = 3u + 4u (= 7u)
balloons = 3ux5 + 4ux3 = 27u (wrong!)

guess & check:
children = 2u + 5u (= 7u)
balloons = 2ux5 + 5ux3 = 25u (wrong!)

guess & check:
children = u + 6u (= 7u)
balloons = ux5 + 6ux3 = 23u (right!)

fraction of children given 5 balloons
= 1/7
Jody Wong
Jody Wong
5 years ago
Brilliant!
Not sure if there is any other method.

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Ruther Teo Zheng
Ruther Teo Zheng's answer
10 answers (A Helpful Person)
1st
Ratios are proportional possibilities of actual quantities, hence you do not need to know the actual number in order to incorporate ratios into algebraic quantities. This applies to fractions and percentages as well.