For nearly all intents and purposes Malay odds are simply decimal odds, minus the 1 at the start to indicate stake. A price that would be 1.33 as a decimal odd, becomes 0.3333 as a Malay odd. In this specific case, you risk 1 unit to win 0.33 units and your stake back.
In the case of any bet higher in odds than 2 in fractional odds, it simply becomes the same price as a decimal odd, minus 1. A decimal price of 6 is translated into a Malay price of 5.000, and you risk 1 unit to win 5 and your stake back.
Asian Gambling Medium
The exact expression of Malay odds can subtly change depending on the exact region using them, so if you have any doubt about a price either check it with the bookmaker or run it through an odds converter.