^^Ok for example if you have 4 liter coolant (undiluted/100%) bottle then take an empty 4 liter bottle with the liter markings on it, pour 2 liter of coolant in the empty bottle and filled the rest with 2 liter of water. (bottle one complete). Shake the bottle before use. Pour the mixture in the radiator as required.
Now fill the first bottle with 2 liter of water which still has 2 liter coolant. (Bottle #2 complete). Shake the bottle before use. Keep the second bottle for topups
Now you have 8 liter of 50/50 coolant ready to use.
@Farhansa pour the coolant in the radiator (when cold). Also pour in the side bottle if required (up to the max or just below the max mark, don't fill the side completely)
Iqbal Bhai are you sure about the Hyndai's Recommendation to use 100% coolent? I don't think any car manufacturing company recommends 100% coolant.