By following these steps you will be able to use less cooking gas (liquid petroleum gas) without compromising your cooking. Before that you need to get a feel for two important words I will be using. (These words are sometimes used interchangeably and hence I feel a clarification is needed.)

TEMPERATURE-

Temperature is usually measured in Degrees Centigrade (C) or Fahrenheit (F). The higher the temperature within a cooking pan the quicker the cooking. However, a temperature that is too high may burn the food.

HEAT - Heat is a form of energy and therefore is usually measured in Jules (J) or kilo Watt hours (kWh). In this case heat is produced by burning LP gas. The more gas you burn the more heat produced by the flame. The smaller the flame the lesser the gas being burned and the lesser the heat energy produced. Heat absorbed by a cooking pan and its contents usually cause its temperature to rise. However, once the boiling point of a liquid in a pan is reached further heating will not cause the temperature of the pan's content to rise until all the liquid has evaporated.

STEPS
1. Use metal pans(such as stainless steel) for cooking,Metals are good conductors of heat while For cooking to occur, heat generated in the flame must reach the food and hence pans made of good conductors of heat are more efficient.
MAINTAIN OUTER SHINY SURFACE ON PANS- Shiny surfaces reject heat (by convection) at a lesser rate than dull or black surfaces do.
Use a pan that is wide enough to cover the flame. - Flames that extend beyond a pan produce heat that escape the pan. Heat that is not absorbed by the pan and its contents is a waste.

KEEP THE PAN CLOSED WHENEVER POSSIBLE- An open pan will allow heat to escape more rapidly than a closed pan would. Escaping steam too is a loss of heat. Trapping this steam inside the pan will allow cooking on a lower flame.
Make SURE THE FLAME IS COLOURLESS AND BLUE. - Yellow flames are an indication that incomplete burning is taking place. This means that the full energy within the gas is not being harnessed. It is best to get a technician to take a look at the cooker or replace it. #forthelove

Thanks for this, I'm grateful