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>×</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>