At the end of year X, automobile installment credit accounted for 20% of all outstanding consumer installment credit. At that time automobile finance companies extended $57 billion of credit, or 1/3 of the automobile installment credit. How many billion dollars of consumer installment credit was outstanding at that time? Answers.
A) 171  B) 855  C) 870  D) 788  E) 684
System of Equations   a = (20/100) c   (1/3) a = 57 --&gt; a = 171   Substitution   171 = (20100) c   c = (100/20) 171   - Calculate 171/20 * 100   The Correct answer B. The answer is 855.
<result>B</result>
At the end of year X, automobile installment credit accounted for 20% of all outstanding consumer installment credit. At that time automobile finance companies extended $57 billion of credit, or 1/3 of the automobile installment credit. How many billion dollars of consumer installment credit was outstanding at that time?