Question

The beach shop sold 12 skim boards on Saturday, and 9 on Sunday. What is the percent of decrease from Saturday to Sunday? (Need full explanation please)

Answer 1

25% decrease

Explanation:

The percentage decrease is the change in quantity divided by the original quantity with which we are comparing it to.

We can use a formula shown below:

Percentage Decrease =
`(New-Old)/(Old)` * 100

Where

New is the newest value (9)

Old is the previous value (12)

So, substituting, we get:

`(9-12)/(12)=-(3)/(12)=-(1)/(4)*100=-25`

So the percentage decrease is 25% decrease (or simply -25%)