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Secondary 1 | Maths
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Help can’t understand
Date Posted: 3 years ago
Views: 467
① Rewrite the ratio in terms of fraction first.
B : C
= 3 2/5 : 0.4
= 17/5 : 4/10
= 17/5 : 2/5
② They have same denominator 5. Multiply both sides by 5 to make them whole numbers.
B : C = 17 : 2
③
Now, A : B = 2 : 1
Rewrite it as :
A : B = 34 : 17 (multiply by 17)
We have now made the units for B the same for both ratios.
④
So A : B : C
= 34 : 17 : 2
B : C
= 3 2/5 : 0.4
= 17/5 : 4/10
= 17/5 : 2/5
② They have same denominator 5. Multiply both sides by 5 to make them whole numbers.
B : C = 17 : 2
③
Now, A : B = 2 : 1
Rewrite it as :
A : B = 34 : 17 (multiply by 17)
We have now made the units for B the same for both ratios.
④
So A : B : C
= 34 : 17 : 2
118 : 142
59 : 71 (divide by 2)
So 118 ÷ 142 = 59 ÷ 71
(Or
118/142 = 59/71)
118 = 59/71 x 142
59 : 71 (divide by 2)
So 118 ÷ 142 = 59 ÷ 71
(Or
118/142 = 59/71)
118 = 59/71 x 142
See 1 Answer
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For 1st Q: Make the common term, in this case B, same, for the 2 ratios.
Date Posted:
3 years ago
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