SOLUTION: Find the percent of the number 13. On a math test, you obatained a score of 66 points. This was 88% of the total number of points on the test . How many total points were on the

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: Find the percent of the number 13. On a math test, you obatained a score of 66 points. This was 88% of the total number of points on the test . How many total points were on the      Log On


   

Question 116377: Find the percent of the number
13. On a math test, you obatained a score of 66 points. This was 88% of the total number of points on the test . How many total points were on the test?
Any help with this equation would be Greatly appreciated.
Answer by bucky(2189) About Me  (Show Source):
You can put this solution on YOUR website!
Let X represent the total number of points on the test.
.
The problem tells you that 88% of X equals 66 points
.
Change 88% to its equivalent decimal form of 0.88.
.
Then multiply 0.88 times X and set that equal to 66 points. In equation form this is:
.
0.88X = 66
.
Solve for X by dividing both sides of this equation by 0.88 and you get:
.
X+=+66%2F0.88
.
Calculator time ... when you divide 66 by 0.88 you get 75. So the answer to this problem is:
.
X+=+75
.
There are 75 points on the exam.
.
Check: If the test has 75 points and you got 88% (or 0.88) of the points correct then you
scored 0.88 times 75 which equals 66 points. This checks with the information in the problem.
.
Hope this helps you to understand percent a little more.
.