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%.

Algebra ->  Percentage-and-ratio-word-problems -> 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%.       Log On


   

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) About Me  (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%5Bend_of_the_month%5D = a*(1+0.40)*(1-0.25) = 1.05a units.



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