Question

A shop's owner decides to calculate the percentage of customers who buy mobile phones. If forty percent of the store's customer decide to purchase items and out of those, fifteen percent of them purchase mobile phones, what percentage of the store's customers purchase mobile phones?

Answer 1

Given:

40% store's customer decide to purchase items

15% them purchase mobile phones

Find percentage of the store's customers purchase mobile phones

Let the total number of customer be x

Number of customer who purchased mobile phones

= 15% of 40% of x

$=\frac{15}{100}\times \frac{40}{100}\times x$

$=\frac{3}{20}\times \frac{2}{5}\times x$

$=\frac{3x}{50}$

requires percentage =$\frac{\frac{3x}{50} }{x}\times 100\%$

=6%

Hence percentage of the store's customers purchase mobile phones is 6%

Answer 2

As we know that,

Given:

Forty percent of the store's customers decide to purchase items.

Fifteen percent of them purchase mobile phones.

Find out:

The percentage of the store's customers purchase mobile phones?

Let us:

$40$% of the store's customers decide to purchase items.

$15$% of them purchase mobile phones.

so consider the x is the total number of customers.

$= \frac{15}{100}$ × $\frac{40}{100}$  × $x$

$= \frac{3}{20}$ × $\frac{2}{5}$ × $x$

$=\frac{3x}{50}$

The required percentage is,

$= \frac{3x/50}{x}$ × $100%$ %

$6$ %, is the percentage of the store's customers purchase mobile phones.