SOLUTION: Mr. chittocks political button collection currently has 840 buttons. This represents a 12% increase over his total collection of 3 years ago. Determine how many buttons were in his

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Mr. chittocks political button collection currently has 840 buttons. This represents a 12% increase over his total collection of 3 years ago. Determine how many buttons were in his      Log On


   

Question 1135047: Mr. chittocks political button collection currently has 840 buttons. This represents a 12% increase over his total collection of 3 years ago. Determine how many buttons were in his collection 3 years ago
Answer by ikleyn(52926) About Me  (Show Source):
You can put this solution on YOUR website!
.
Let x be the number three years ago.


According to the condition, this number "x" is the base for the comparison,


so your equation is


    x*(1+0.12) = 840

    1.12x = 840

     x = 840/1.12 = 750.


ANSWER.  3 years ago the collection was 750 buttons.

Solved.

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    - Problems on percentage that lead to unexpected results
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