Percent change help please (math)
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Percent change help please (math)

[From: ] [author: ] [Date: 13-10-23] [Hit: ]
100 - (0.100 - (0.(1/4)(100) DOES NOT EQUAL 75-Your friend is right. for example 4 multiplied by .25 is 1. And 1 would be 25% of 4.......
A fried says that multiplying a number by 1/4 is a 25% decrease describe and correct the error Help??

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Multiplying by 1/4 will decrease the number by 75%

Use an easy number like 100

(1/4)(100) = 25

100 decreased by 75% can be written by the expression:
100 - (0.75)(100) = 100 - 75 = 25

One hundred decreased by seventy-five percent of one hundred = 25
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EDIT:

A 25 percent decrease in 100 would be written as:

100 - (0.25)(100) = 100 - 25 = 75

(1/4)(100) DOES NOT EQUAL 75

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Your friend is right. for example 4 multiplied by .25 is 1. And 1 would be 25% of 4.
1
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