A waiter's salary consists of his salary and tips. During one week his tips were 9/4 of his salary. What fraction of his income came from tips ?	Select:	A) 4/9	B) 5/4	C) 9/13	D) 5/9	E) 6/9
Income = salary (s) +tips = s + s*9/4 = s*13/4   Tips = s*9/4   fraction of his income came from tips = (s*9/4)/(s*13/4)= 9/13   ANSWER:9/13
<result>C</result>
A waiter's salary consists of his salary and tips. During one week his tips were 9/4 of his salary. What fraction of his income came from tips ?