Question

The price of milk increased from $3.25 to $3.75. What is the percent of change for the price of milk to the nearest percent?

Answer 1

`15%` increase

Explanation:

`3.75-3.25 = 0.5` US dollars.

`0.5/3.25 = 0.1538`

As a percentage form :

= `100xx0.1538 = 15.38%`

or simply `15%`.

Answer 2

`=15.38%`

Explanation:

`(3.75-3.25)/3.25times100`

`=0.5/3.25times100`

`=0.1538times100`

`=15.38%`

Answer 3

`15.38%` which would probably be given as `15.4%`

Explanation:

To find a percent increase or decrease, the method is the same.

`"change"/"original" xx100%`

`3.75-3.25 = 0.50`

`0.5/3.25 color(red)(xx 100%)`

=`15.38%`
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Note:

A common error is to multiply by 100 and not 100%

`color(red)(xx 100%)` is the same as `color(red)(xx 100/100`

Multiplying by 1 does not change the value, only what the number looks like.

`0.5/3.25 xx100 = color(blue)(15.38)" These answers shown"`
`0.5/3.25 xx100% = color(blue)(15.38%)" in blue are different!!"`

`0.5/3.25 = color(red)(0.1538)` and `color(red)(15.38% = 0.1538)`

These answers shown in red are the same.