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primary 6 | Maths
| Data Analysis
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Date Posted: 5 years ago
Views: 287
To do ratio questions you have to find one thing that does not change and a that one thing u can use to compare between two different ratios. In this case it is the total number of stickers Aaron, benedict and caleb has.
For simplicity let A be Aaron, B be benedict and C be caleb
A : B and C : A and B and C
2 : 3 : 5
B : A and C : A and B and C
4 : 5 : 9
You want to make the values A and B and C units to be the same. And the common multiple of 5 and 9 is 45.
So change it to
A : B and C : A and B and C
18 : 27 : 45
B : A and C : A and B and C
20 : 25 : 45
From here all units are of the same value.
So u can start to minus.
C has 27 - 20 = 7 units
So...
A : B : C
18 : 20 : 7
For simplicity let A be Aaron, B be benedict and C be caleb
A : B and C : A and B and C
2 : 3 : 5
B : A and C : A and B and C
4 : 5 : 9
You want to make the values A and B and C units to be the same. And the common multiple of 5 and 9 is 45.
So change it to
A : B and C : A and B and C
18 : 27 : 45
B : A and C : A and B and C
20 : 25 : 45
From here all units are of the same value.
So u can start to minus.
C has 27 - 20 = 7 units
So...
A : B : C
18 : 20 : 7
See 1 Answer
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Date Posted:
5 years ago
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