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Interest (Simple) - Principle from Interest, Rate, and Time (Level 3)

The topics in this unit focus on introducing simple interest, principle, rate, and time, and how to calculate any of them given the others. Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Interest (Simple) - Principle from Interest, Rate, and Time

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.

What is the principle in this simple interest situation?

Interest =$350Rate =10%Time =7yrsPrinciple =$?\begin{align*}\text{Interest } &= \$350\\ \text{Rate } &= 10\%\\ \text{Time } &= 7\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}

Interest (Simple) - Principle from Interest, Rate, and Time Worksheet

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Math worksheet on 'Interest (Simple) - Principle from Interest, Rate, and Time (Level 3)'. Part of a broader unit on 'Percents and Simple Interest - Practice' Learn online: app.mobius.academy/math/units/percents_and_simple_interest_practice/
1
What is the principle in this simple interest situation?
A LaTex expression showing \begin{align*}\text{Interest } &= \$360\\ \text{Rate } &= 15\%\\ \text{Time } &= 3\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
a
80
b
800
c
1,360
d
880
e
1,520
f
480
2
What is the principle in this simple interest situation?
A LaTex expression showing \begin{align*}\text{Interest } &= \$630\\ \text{Rate } &= 15\%\\ \text{Time } &= 6\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
a
1,120
b
210
c
980
d
630
e
700
f
770
3
What is the principle in this simple interest situation?
A LaTex expression showing \begin{align*}\text{Interest } &= \$350\\ \text{Rate } &= 10\%\\ \text{Time } &= 7\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
a
750
b
900
c
850
d
150
e
950
f
500
4
What is the principle in this simple interest situation?
A LaTex expression showing \begin{align*}\text{Interest } &= \$90\\ \text{Rate } &= 30\%\\ \text{Time } &= 3\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
a
140
b
180
c
100
d
150
e
80
f
50
5
What is the principle in this simple interest situation?
A LaTex expression showing \begin{align*}\text{Interest } &= \$100\\ \text{Rate } &= 10\%\\ \text{Time } &= 5\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
a
320
b
300
c
380
d
140
e
20
f
200
6
What is the principle in this simple interest situation?
A LaTex expression showing \begin{align*}\text{Interest } &= \$80\\ \text{Rate } &= 5\%\\ \text{Time } &= 8\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
a
80
b
60
c
340
d
200
e
360
f
240
7
A LaTex expression showing \begin{align*}\text{Interest } &= \$1714.9999999999998\\ \text{Rate } &= 35\%\\ \text{Time } &= 7\text{yrs}\\ \\ \text{Principle } &= \$?\end{align*}
What is the principle in this simple interest situation?
a
280
b
1,330
c
840
d
700
e
210
f
140