Ninety percent of the ninth-grade students at Richbartville High School take algebra. If 180 ninth-grade students take algebra, how many ninth-grade students do not take algebra?

Question

tadvisohil886 · Answer

Let the total number of students be x. 
 Now, according to your question, 90% of x = 180 
 = 90/100 * x = 180 
 90x = 18000 
 Thus, x = 18000/90 
 = 200. 
 Thus, the total number of students are 200. Out of these, 180 are taking algebra. Thus, 20 students are not taking algebra.

Ninety percent of the ninth-grade students at Richbartville High School take algebra. If 180 ninth-grade students take algebra, how many ninth-grade students do not take algebra?

Answer (1)

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