There are a total of 10 + 4 = 14 kg of syrup.
4 out of the 14 kg are sugar so the percentage is:
4/14 = 28.6%
Edit: The answer is correct. I don’t know why it was flagged as incorrect.
The total amount of ingredients in the syrup is 14 kg. Of the 14 kg, 4 kg is composed of sugar. So, 4 kg of sugar divided by the 14 kg of total weight will give you the percentage of sugar.
4/14 = 0.285714285714286
With an additional significant figure, the answer is 28.57%
