香港巴士論壇

Please solve the following questions:
(1) A digital camera is sold at $1600 with a profit of 25%. Find the cost price and profit.

(2) A calculator is sold for $150 at a loss of 25%. Find the cost price and loss.

Thanks

dicky :Please solve the following questions:
(1) A digital camera is sold at $1600 with a profit of 25%. Find the cost price and profit.

(2) A calculator is sold for $150 at a loss of 25%. Find the cost price and loss.

Thanks

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(1) A digital camera is sold at $1600 with a profit of 25%. Find the cost price and profit.
Let y be the cost price of the camera.
y X (1+25%) = 1600
1.25y = 1600
y = 1280
Therefore, the cost price of the camera is $1280.

1600 - 1280
=320
The profit is $320.

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(2) A calculator is sold for $150 at a loss of 25%. Find the cost price and loss.
Let y be the cost price of the calculator.
y X (1-25%) = 150
0.75y = 150
y = 200
Therefore, the cost price of the calculatoris $200.

200 - 150
=50
The profit is $50.

有錯請指

直接出都得啦

1)
Cost Price = $1600 / (1+25%) = $1280
Profit = $1600-1280 = $320

2)
Cost Price = $150 / (1-25%) = $200
Loss = $200-$150 = $50

唔識最好問老師