SOLUTION: if i got a 87 on a test and there were 90 questions how many did i get wrong

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Question 277670: if i got a 87 on a test and there were 90 questions how many did i get wrong
Found 2 solutions by aditiechawla@gmail.com, richwmiller:
Answer by aditiechawla@gmail.com(1) About Me  (Show Source):
You can put this solution on YOUR website!
87% of 90 questions = 87/100 *90
= 78.30
78.30 questions were answered correctly,
the questions not answered correctly = 90-78.30
= 11.7

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
100/90=1.1111
each answer is worth 1.1111
100-87=13 points missed (wrong)
13/1.1111=11.7 answers wrong.