I like a ratio of one to one and the sugar dissolves easily enough that I find it unnecessary to heat the mixture. In a an empty 750 ml liquor bottle add one cup of sugar and one cup of water. Shake vigorously until the sugar is dissolved. Store the syrup in your refrigerator and shake briefly before each use to remove any crystallization.
Pure Cane Simple Syrup
1 cup sugar in the raw
1 cup water
Combine ingredients in an empty 750 ml bottle. Shake vigorously. Store in the refrigerator.