Question

A whole seller supplies 90 books while he was ordered to send 80 books by a retailer. If 15%trade discount was given, what was the net discount to the retailer? please help me someone
answer in percentage

Answer 1

15% = 15÷100 = 0.15
Let the net discount on 80 books be y
Since 15% is the discount on 90 books, it should be obvious that the discount on 80 books would be less than 15%. Therefore, this is a case of direct proportion.

90 × y = 80 * 0.15
90y = 12
y = 12 ÷ 90
y = 0.13333 or 13.33%
Therefore, the net discount when calculated over 80 books is 13.33%

Answer 2

Answer:

When 80 books are included, the net discount equals 13.33%.

Step-by-step explanation:

Given Data:

Total discount given on 90 books = 15 %

The number of books he ordered = 80.

To Find:

The percentage discount on 80 books

Calculations:

We know the total discount on 90 books was 15 %

And

15% = 15÷100 = 0.15

Let the net discount on 80 books be y

It should be evident that the discount on 80 books would be less than 15% since 15% is the discount on 90 books. This is an instance of direct proportion.

90 × y = 80 × 0.15

90y = 12

$y =\frac{12}{90}$

y = 0.13333 or 13.33%

Therefore, In a calculation including 80 books, the net discount is 13.33%.

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