F1 英數

Cathy bought a coat which was marked $1250 at a 60% discount.
(a) Find the selling price.

Selling price
= $1250 * (1-60%)
= $1250* (40%)
= $1250 * 0.4
= $500

So the selling price is $500.
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(b) If Anna got an extra discount of $100 for the same coat, find the discount percent Anna got.

Discount to be offered
= ($500-$100)/$1250 * 100%
= $400/$1250 * 100%
= 32%

So the discount to be offered 32%.

2006-12-10 20:43:54 補充：
Sorry, the last statement of part (b) should be「So the discount to be offered 100%-32% = 68%」

Cathy bought a coat which was marked $1250 at a 60% discount.
(a) Find the selling price.

Selling price
= $1250 * (1-60%)= $1250* (40%)= $1250 * 0.4= $500

So the selling price is $500.


(b) If Anna got an extra discount of $100 for the same coat, find the discount percent Anna got.

Discount to be offered
= ($500-$100)/$1250 * 100%= $400/$1250 * 100%= 32%

So the discount to be offered 32%.

THE selling price
=1250X60%
=$750
the discount percent
750-100
=________x100%
1250
650
=________X100%
1250
=52%