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If 0.764y = 1.236x, then what is the value of \( \Large \frac{y - x}{y + x} \)?

A) 0.764
B) 0.236
C) 2
D) 0.472

Correct Answer:


B) 0.236

Description for Correct answer:

Given, 1.5x = 0.04y

\( \Large \frac{y}{x} = \frac{1.236}{0.764} = \frac{309}{191} \)

\( \Large \left(\frac{y - x}{y + x} \right) = \left(\frac{\frac{y}{x}-1}{\frac{y}{x}+1}\right) = \left(\frac{\frac{309}{191}-1}{\frac{309}{191}+1}\right) = \left(\frac{\frac{118}{191}}{\frac{500}{191}}\right) = \frac{118}{500} \)= 0.236

Part of solved Simple and Decimal fraction questions and answers : >> Elementary Mathematics >> Simple and Decimal fraction

Comments

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