The sale of sweets during last week was less by 20%. How much per cent in this week's sale of sweets more than that of last week?
Answers
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Yale-New Haven Teachers Institute Home
Solving Problems “by the Hundreds” A Study of Percentage and Its Applications in the Study of Consumer Related Problems
by
Lauretta J. Fox
Contents of Curriculum Unit 80.07.07:
Introduction
The Meaning of Percent
Percents, Common Fractions, a Decimals
Percentage Problems
Sales Tax and Gratuities
Discount
Commission
Simple Interest
Compound Interest
Compound Interest Table
Bibliography for Teachers
Student Reading List
To Guide Entry
Introduction
Percentage is a mathematical concept that appears very frequently in everyday life. You read that a merchant is offering a twenty percent discount on a selected group of items. The manufacturer of an article of clothing states that the material is sixtyfive percent dacron and thirty five percent polyester. Savings banks pay a five and one half percent interest rate annually on regular savings accounts. The state of Connecticut has raised the rate of its sales tax to seven and one half percent.
These and similar items which appear daily in newspapers indicate the importance of understanding the concept of percentage. In order to live more insightfully, wisely and enjoyably every citizen should be able to perform simple mathematical calculations which enable him to compute discount and sales tax on purchases, gratuities for services performed, interest on savings accounts and loans, deductions from his weekly pay and other consumer related problems which he encounters from day to day.