IXL | Percent word problems with money

A
store
pays
$21
for
a
baseball
bat
and
marks
the
price
up
by
15%
.
What
is
the
amount
of
the
mark-up?

ref_doc_title.

Learn with an example

question

Nick
has
$90
in
a
savings
account
that
earns
10
%
annually.
The
interest
is
not
compounded.
How
much
interest
will
he
earn
in
1
year?

Use the formula i = prt, where i is the interest earned, p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years.

key idea

i = prt

i	is the interest earned

p	is the principal (starting amount)

r	is the interest rate expressed as a decimal

t	is the time in years

solution

Write the rate as a decimal.

0.1

Calculate the interest earned.

$90

0.1

The interest will be $9.

Looking for more? Try these:

Lesson: Percents

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V.4Percents of numbers and money amounts

Lesson: Percents

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