If 0.764 x P = 1.236 x Q, then what is the value of (Q - P) / (Q + P)?

Given, 0.764 x P = 1.236 x Q
⇒ Q / P = 1.236 / 0.764
Now, (Q - P) / (Q + P) = [(Q/P) - 1] / [(Q/P) + 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