Ashton S.

asked • 08/12/15

A number decreased by 23% becomes 539. Find the number

 I don't know what to do

1 Expert Answer

By:

Andrew M. answered • 08/12/15

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Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

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Lets call the number x
decreased means subtraction.  If x is decreased bt 23% then the result is
x-23%(x)  =  x-(23/100)x    or x-.23x
 
 
x-.23x=539
.77x=539
x=539/.77
x=700
 
check:  700-.23(700)=539
            700-161=539
            539=539
            Our answer is correct
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