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 $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? Pick:
A) 62
B) 171
C) 475
D) 513
E) 684
Total automobile instalment credit = 57*3= 
<gadget id="calculator">57*3</gadget>
<output>171</output>
171   Total consumer instalment credit=171∗100/36=475;Answer = C. 475
<result>C</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 $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?