Page 21 - Math Booklet Prep1first part1_Neat
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Third: Application of percentage
Percentage is a ratio whose second term always =100
A percent is a ratio that compares a number to 100 ( % ) like :
68 • 0.03 = 3 = 3%
100
= 68%
100
Also : 25% = 25 • 0.75 = 75 = 75%
100
100
Discount = original price × d% = original price × ??
??????
The price after the discount = the original price - the value
of the discount
Example
1) If the price of a mobile phone in a store is 12,750 pounds, the
price is reduced by a rate of 8%. What is the price after the
reduction? The value of the reduction in pounds
The price of discount = original price × d% = 12,750 × ????????= 1,020 pounds
the price after discount = 12,750 – 1020 = 11,730 pounds
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