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7 Comparing Quantities

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 recapitulate the concepts of percentage
 apply the knowledge of percentage in dealing with the problems related to profit and loss, discounts and
taxes, as well as in calculating interest
 calculate compound interest when interest is compounded yearly, half-yearly or quarterly
 solve real-life problems based on compound interest, growth and depreciation, etc.

get ready!

Leela went to a departmental store with her mother for shopping.

Mummy, look at this No, dear! Look at its weight carefully.
pack. It gives an offer It has written 80 g + 20 g for `10
of 20 g extra biscuits. only. Its weight was 100 g earlier also
and sold for the same price.

Absolutely right! Next time
we will get 20% fewer
items when we buy it.

Understood! The
company misleads
the customers. They
shorten the quantity
and make a profit
without increasing
the rate of the
product.

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