Homework Help: MATH

Posted by PLEASE HELP on Sunday, March 6, 2011 at 11:33pm.

Wendy answered 85% of the questions on her history test correctly. There were 40 questions on the test and all the questions had equal value. How many questions did Wendy NOT answer correctly on her test?

MATH - Bill, Monday, March 7, 2011 at 12:04am
first you need to find 85% of 40 questions. turn 85% into the decimal .85... you do that by dividing 85 by 100. the formula is x=.85(40) and that gives you x=34. so now you know that Wendy had 34 out of 40 questions right, so now to find out how many she had wrong you subtract 34 from 40 and get 6. Wendy did not answer 6 questions correctly. Another faster way of doing this would be to realize since she had 85% right, then you know she had 15% wrong, so x=.15(40) , so x=6. Hope this helped.

Answer this Question

Related Questions

Math - Wendy answered 85% of the questions other history test correctly . There ...
math - Sally answered 90% of the math test questions and 80% of the history test...
math - janice scored 85% on the last test. she answered 34 questions correctly. ...
3rd grade math - on one test, chi answered 76 out of 100 questions correctly. on...
math help - I need help solving this math problem, please: Problem: Angela's...
Math - I need help solving this math problem, please: Problem: Angela's math...
statistics - On a test, 55% of the questions are answered correctly. If 44 ...
math - algebra in 8th your teacher is giving you a test worth 100 points ...
Stats - An instructor gives a test with 20 multiple choice questions. There are ...
math-Probablity - A student is writing a multiple choice test consisting of 40 ...

For Further Reading

First Name:
School Subject:
Answer: