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- Identify CP and SP.
- Find profit/loss amount.
- Use CP as base for percentage if asked.
Correct Answer: D
Correct Answer: D
Method / Topic: Profit and Loss
Profit or loss percentage is calculated on cost price.
Short Explanation
Detailed Explanation
Correct Answer: D
Method / Topic: Profit and Loss
<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">ANSWER:<br />
3.5%<br />
<br />
<br />
Convert each increase or decrease into a multiplier and apply the multipliers in the order given.<br />
<br />
CALCULATION:<br />
Net factor = 0.90 × 1.15 = 1.035; overall increase = 3.5%.<br />
<br />
CHECK:<br />
An output of 100 becomes 90 and then 103.5.<br />
<br />
EXAM TIP:<br />
Successive changes use changing bases, so multiplying factors is safer than adding signed percentages.<br />
<br />
<br />
Equal-looking increases and decreases do not normally cancel because their bases differ.<br />
<br />
FINAL CHECK:<br />
Confirm the quantity treated as 100%, the direction of change, and the requested unit before selecting an option.<br />
<br />
APPLICATION:<br />
The same percentage logic is useful in bills, scores, production, measurements, and comparisons.<br />
<br />
CONCLUSION:<br />
Therefore, the correct
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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 CP and SP.
- Find profit/loss amount.
- Use CP as base for percentage if asked.
A workshop's output drops by 10% during maintenance and then rises by 15% from the reduced level. What is the overall percentage change?
Explanation
Correct Answer: D
Method / Topic: Profit and Loss
Profit or loss percentage is calculated on cost price.
Short Explanation
Detailed Explanation
Correct Answer: D
Method / Topic: Profit and Loss
<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">ANSWER:<br />
3.5%<br />
<br />
<br />
Convert each increase or decrease into a multiplier and apply the multipliers in the order given.<br />
<br />
CALCULATION:<br />
Net factor = 0.90 × 1.15 = 1.035; overall increase = 3.5%.<br />
<br />
CHECK:<br />
An output of 100 becomes 90 and then 103.5.<br />
<br />
EXAM TIP:<br />
Successive changes use changing bases, so multiplying factors is safer than adding signed percentages.<br />
<br />
<br />
Equal-looking increases and decreases do not normally cancel because their bases differ.<br />
<br />
FINAL CHECK:<br />
Confirm the quantity treated as 100%, the direction of change, and the requested unit before selecting an option.<br />
<br />
APPLICATION:<br />
The same percentage logic is useful in bills, scores, production, measurements, and comparisons.<br />
<br />
CONCLUSION:<br />
Therefore, the correct
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