Suppose X =1/3 y , y=2/3 r and r = 3/4 s, what would be the value of y as a fraction a of s?

A 1/2
B 2/3
C 3/4
D 1/4

Correct Answer: 1/2

y = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>3</mn></mfrac><mi>r</mi><mo> = </mo><mfrac><mn>2</mn><mn>3</mn></mfrac><mo>&#xD7;</mo><mfrac><mn>3</mn><mn>4</mn></mfrac><mi>s</mi><mo> = </mo><mfrac><mn>1</mn><mn>2</mn></mfrac><mi>s</mi></math>
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