SOLUTION: Compare the average score of a student at the beginning of a month and at the end of that month, if at first, it increased by 40%, then decreased by 25%.

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Question 1153683: Compare the average score of a student at the beginning of a month and at the end of that month, if at first, it increased by 40%, then decreased by 25%.
Answer by ikleyn(52835)   (Show Source): You can put this solution on YOUR website!
.

If at the beginning of the month the score was "a" units, 


then at the end of the month it will be   = a*(1+0.40)*(1-0.25) = 1.05a units.



The difference   -  = 0.05a, or 5% of "a".



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