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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
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Solve this faster with the right shortcut first
Shortcut used: Find the base value first, then convert the percentage into a fraction or direct multiplier.
Solve in 3 steps:
- Identify the base.
- Convert percent to fraction/decimal.
- Calculate and match options.
Common mistake: Do not change the base in increase, decrease, or comparison questions.
Question 9
Multiple Choice Question
Question
What is 42.5% of 640?
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Percentage
42.5% of 640 is 272.
Why this answer is correct
The answer uses the correct base for the percentage calculation.
Short Explanation
42.5% of 640 is 272.
Detailed Explanation
Question
What is 42.5% of 640?
ANSWER
Correct Answer: D
Method / Topic: Percentage
Convert 42.5% to 0.425 and multiply by 640 to obtain 272.
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Question 9
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: Find the base value first, then convert the percentage into a fraction or direct multiplier.
Solve in 3 steps:
- Identify the base.
- Convert percent to fraction/decimal.
- Calculate and match options.
Common mistake: Do not change the base in increase, decrease, or comparison questions.
Question
What is 42.5% of 640?
Explanation
Correct Answer: D
ANSWER
Correct Answer: D
Method / Topic: Percentage
42.5% of 640 is 272.
Why this answer is correct
The answer uses the correct base for the percentage calculation.
Short Explanation
42.5% of 640 is 272.
Detailed Explanation
Question
What is 42.5% of 640?
ANSWER
Correct Answer: D
Method / Topic: Percentage
Convert 42.5% to 0.425 and multiply by 640 to obtain 272.
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