A Brief Overview of Methods for Solutions to Simple Percent Problems
Percent Problems
can be arranged in two types Vertical
or Horizontal
An elementary
method is Proportions an advanced method is an Algebra Equation.
The Law of Proportions
applies to both types of arrangements for Proportions.
The Elementary
method or arrangement changes the % to a fraction
while changing the
(of N) and (is N) to a fraction.
The use of Calculators if highly encouraged for students of
all ages.
25% of N is 4 50% of 28 is N N% of 24 is 18 125%
of 20 is N
25 4 50 N N 18 125 N
---- =
---- ---- =
---- ---- =
---- ---- =
----
100 N 100 28 100 24 100 20
25N = 400 1400 = 100N 24N = 1800 2500
= 100N
N = 16 14 = N N = 75 25
= N
Checking
25% of 16 is 4 50% of 28 is 14 75% of 24 is 18 125%
of 20 is 25
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The Algebraic
method or arrangement changes the (of to X) while the (is to =)
while the other
elements to the statements become parts of an equation.
The use of Calculators if highly encouraged for students of
all ages.
25% of N is 4 50% of 28 is N N% of 24 is 18 125%
of 20 is N
.25 * N = 4 .50
* 28 = N N * 24 = 18 .125 * 20 = N
N = 16 14 = N N = .75 25
= N
Checking
25% of 16 is 4 50% of 28 is 14 75% of 24 is 18 125%
of 20 is 25
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