[21]
Let's go ahead and look at some percentage
change problems.
[25]
We will use the formula new minus old ( if
you don't like the term old you can use original)
[36]
over the old times 100
The new value is 41 nails, minus the original
[49]
which is 36 over the old or the original,
which is 36.
[57]
41 - 36 equals 5, and 5 divided by 36 equals
.14 and multiply this by 100 you get 14 percent.
[79]
Because it is positive it will be a percent
increase.
[90]
Now let's look at one that is a percentage
decrease.
[98]
We have a wooded toy with an original price
of 14.99 and now it costs 11.18
[104]
The new price is 11.18 minus the old price
of 14.99 over the old term of 14.99
[120]
In this instance, when you subtract you get
a negative number of 3.81
[133]
This tells you it will be a percent decrease.
[139]
Now put 14.99 as the old price.
[144]
When you divide -3,81 by 14.99 you get negative
.25 and multiply by 100 you get a percentage
[163]
decrease of 25 percent
Let's work one more percentage change example.
[177]
Number two you start with 15 taxis and now
you have 15.
[185]
I will take new minus old over old.
[191]
5 -15 divided by 15
5 - 15 = -10
[201]
-10 divided by 15 equals -.67 times 100 equals
negative 67 percent
[214]
This will be a percent decrease
Hope this helps with percentage change.
[223]
The formula is, new minus old over old times
100 and this will give you the percent increase
[236]
or percent decrease
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