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- Identify the base.
- Convert percent to fraction/decimal.
- Calculate and match options.
Correct Answer: C
Correct Answer: C
Method / Topic: Percentage
The answer uses the correct base for the percentage calculation.
Short Explanation
Detailed Explanation
Correct Answer: C
Method / Topic: Percentage
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">After a 15% decrease, 85% of the original remains. Therefore, original number=340×100/85=400.</span></td>
</tr>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"> </td>
</tr>
</tbody>
</table>
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Identify the base.
- Convert percent to fraction/decimal.
- Calculate and match options.
A number is decreased by 15% and becomes 340. Find the original number.
Explanation
Correct Answer: C
Method / Topic: Percentage
The answer uses the correct base for the percentage calculation.
Short Explanation
Detailed Explanation
Correct Answer: C
Method / Topic: Percentage
<table cellspacing="0" style="border-collapse:collapse; height:20px; width:85px">
<tbody>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"><span style="color:#000000">After a 15% decrease, 85% of the original remains. Therefore, original number=340×100/85=400.</span></td>
</tr>
<tr>
<td style="border-bottom:none; border-left:none; border-right:none; border-top:none; height:20px; vertical-align:top; white-space:normal; width:85px"> </td>
</tr>
</tbody>
</table>
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