Question

Question #33b22

Answer 1

`"Percentage increase" = (("new value")-("old value"))/"old value" xx 100%`

Explanation:

For example:
If at the beginning of the year you had `$500` in savings
and at the end of the year you had `$600` in saving,
the percentage increase over the year would be:
`color(white)("XXX")($600-$500)/($500) xx 100% = 100/500 xx 100% =1/5 xx 100 = 20%`

Answer 2

`"increase"="new number"-"original number"`

`"% increase"="increase" -: "original number"xx100%`

Explanation:

Example:

Susie currently makes $400 per week. She is getting a raise and will be making $425 per week. What is the percentage increase in her salary?

To determine the increase, subtract $400 from $425.

`"increase"="$425"-"$400"="$25`

To determine the percentage increase, divide $25 by $400, then multiply by 100.

`"% increase"=("$25")/("$400")xx100%="6.25%"`