If 0.764 B = 1.236 A, then what is the value of (B

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If 0.764 B = 1.236 A, then what is the value of (B - A)/(B + A) ?

1. 0.764
2. 0.236
3. 2
4. 0.472

Correct Option: B

Given, 0.764 B = 1.236 A
⇒ B/A = 1.236 / 0.764
Now, (B - A)/(B + A) = (B/A - 1) / (B/A + 1)
= (1.236/0.764 - 1) / (1.236/0.764 + 1)
= (1.236 - 0.764)/(1.236 + 0.764)
= 0.472/2.000
= 0.236