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Basic Math Sec. 5.3B

Solving % problems using proportions

AB
What is the % proportiona:b = p:100
"a" stands forthe amount
"b" stands forthe base
"p" stands forthe percent
The base always follows the word"of"
The base is theentire quantity
The amount is thepart being compared to the whole
Which quantity should you identify first"p" (it's easy to spot the %)
Which quanity should you identify second"b" (comes after "of")
Once you know "p" and "b", the remaining number is"a"
Once you get an answer, determine if it isreasonable
100% of 12 is12
50% of 12 is6
25% of 12 is3
33% of 12 isapproximately 4
10% of 12 is1.2


Math 044 Instructor
Ivy Tech Community College

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