Cash-Till CassieStoryspinners · word problems

A rolling cash register with a sale tag: percents, discounts and interest.

Percent Word Problems

Percents, discounts and interest. In MathBound, the free Algebra I adventure game, Cash-Till Cassie asks these problems, and the only way past is to solve them.

Part of Solving Linear Equations: chapter 2 of the standard course.

Play this battle free

10 questions, no sign-up, nothing saved. Climbs from the basics to harder questions.

What you will practice

Basic Percent Equations. Translate and solve to find the part (e.g., "What is p% of w?").
General Applications. Solve a basic one-step percent application (e.g. finding tax or tip given the rate).
Percent Change. Calculate the percent increase given original and new amounts.
Simple Interest. Calculate simple interest using I = Prt where time is in whole years.

Worked examples

Made by the game’s own question engine. Try each one, then open its steps.

Example 1 · Basic Percent Equations

What

number

is

20%

of

220 ?

$20$
$176$
$11$
$44$

Show the worked steps

$20%$ $is$ $\frac{20}{100} = 0.2 .$
$0.2 \cdot 220 = 44 .$

Answer: $44$

Example 2 · General Applications

A

bike

costs

$380

before

tax.

Find

the

6%

sales

tax

on

it.

$$357.20$
$$63.33$
$$402.80$
$$22.80$

Show the worked steps

$6%$ $of$ $$380$ $is$ $0.06 \cdot 380 .$
$The$ $tax$ $is$ $$22.80 .$

Answer: $$22.80$

Example 3 · Percent Change

A

store

raised

the

price

of

a

coat

from

$170

to

$187 .

Find

the

percent

increase.

$110%$
$17%$
$10%$
$9.1%$

Show the worked steps

$The$ $increase$ $is$ $$17 .$
$Percent$ $change$ $compares$ $to$ $the$ $ORIGINAL:$ $\frac{17}{170} = 0.1 .$
$That$ $is$ $10%.$

Answer: $10%$

Where it is in your textbook

Textbook	Lessons
Standard course	2.6
Big Ideas Math Algebra 1	1.5
Big Ideas Math Algebra 1 (2022)	1.7
Carnegie Learning Algebra I	M3 2.1
CPM Core Connections Algebra	5.3.2
Eureka Math Algebra I (EngageNY)	1.25-1.28, 3.4
Glencoe Algebra 1	0-6, 2-7
Holt McDougal Larson Algebra 1	1.5, 2.8
Illustrative Mathematics Algebra 1	5.14-5.15, 5.16-5.18
Illustrative Mathematics Algebra 1 (v.360)	6.14-6.15, 6.16-6.18
Math Nation Algebra 1 (Florida B.E.S.T.)	13.1
OpenStax Elementary Algebra 2e	3.2
Pearson Algebra 1 Common Core	2-9, 2-10

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