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Shortcut used: Reduce the ratio first, then scale both terms by the same multiplier.
Solve in 3 steps:
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Common mistake: Do not scale only one side of the ratio.
Question 5
Multiple Choice Question
Question
If a:b=7:9 and b:c=3:5, what is a:c?
Explanation
Correct Answer: C
ANSWER
Correct Answer: C
Method / Topic: Ratio and Proportion
The ratio a:c is 7:15.
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
The ratio a:c is 7:15.
Detailed Explanation
Question
If a:b=7:9 and b:c=3:5, what is a:c?
ANSWER
Correct Answer: C
Method / Topic: Ratio and Proportion
Make b equal: a:b=7:9 and b:c=9:15. Therefore, a:c=7:15.
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Question 5
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Reduce the ratio first, then scale both terms by the same multiplier.
Solve in 3 steps:
- Write the ratio clearly.
- Find the common multiplier.
- Apply it to the missing term.
Common mistake: Do not scale only one side of the ratio.
Question
If a:b=7:9 and b:c=3:5, what is a:c?
Explanation
Correct Answer: C
ANSWER
Correct Answer: C
Method / Topic: Ratio and Proportion
The ratio a:c is 7:15.
Why this answer is correct
The answer keeps the ratio proportional.
Short Explanation
The ratio a:c is 7:15.
Detailed Explanation
Question
If a:b=7:9 and b:c=3:5, what is a:c?
ANSWER
Correct Answer: C
Method / Topic: Ratio and Proportion
Make b equal: a:b=7:9 and b:c=9:15. Therefore, a:c=7:15.
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