# F.1百分比應用題 (8題)

Rating

3) Discount percent

= (1500 - 1250)/1500 * 100%

= 250/1500 * 100%

= 16.67%

(4) Discount = \$28 * 30% = \$8.4

Selling price = \$28 - \$8.4 = \$19.6

(5) Marked price = \$176 / (1 - 12%)

= \$176 / 0.88

= \$200

(6) (a) Marked price = \$25.5 / (1 - 15%)

= \$25.5 / 0.85

= \$30

(b) Catherine saves \$30 - \$25.5 = \$4.5

(7)(a) Marked price = \$9900 / 18%

= \$55000

Selling price = \$55000 - \$9900

= \$45100

(b) Total discount = \$9900 + \$1100 = \$11000

Discount percent = \$11000/\$50000 * 100%

= 20%

(8) New marked price = \$700 * (1 + 20%)

= \$700 * 1.2

= \$840

Selling price = \$840 * (1 - 15%)

= \$840 * 0.85

= \$714

(9) Selling price at shop A = \$400 * (1 - 25%)

= \$400 * 0.75

= \$300

Selling price at shop B = \$380 * (1 - 20%)

= \$380 * 0.8

= \$304

Shop A is cheaper than shop B by 304 - 300 = \$4

(10) Selling price for the sweater = \$300 * (1 - 20%)

= \$300 * 0.8

= \$240

Selling price for the dress = \$400 * (1 - 30%)

= \$400 * 0.7

= \$280

She should pay \$240 + \$280 = \$520

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仲有,你出得果10點就想人幫你做哂,好難BO~