At the end of year X, automobile installment credit accounted for 36% of all outstanding consumer installment credit. At that time automobile finance companies extended $75 billion of credit, or 1/2 of the automobile installment credit. How many billion dollars of consumer installment credit was outstanding at that time?  Choices:  A) 412.16  B) 150  C) 400  D) 416.67  E) 420.34
System of Equations   a = (36/100) c   (1/2) a = 75 --&gt; a = 150   Substitution   150 = (36/100) c   c = (100/36) 150   Calculate 150/36 * 100   The Correct Answer is D   - The correct answer will be slightly smaller than 513. Therefore, the correct answer is 475.
<result>D</result>
At the end of year X, automobile installment credit accounted for 36% of all outstanding consumer installment credit. At that time automobile finance companies extended $75 billion of credit, or 1/2 of the automobile installment credit. How many billion dollars of consumer installment credit was outstanding at that time?