Answer :

Let's solve the problem step by step.

1. Convert the second value from kilograms to grams:

We know that 1 kilogram (kg) is equal to 1000 grams (g). Therefore, to convert 2.5 kilograms to grams:
[tex]\[ 2.5 \, \text{kg} \times 1000 \, \text{g/kg} = 2500 \, \text{g} \][/tex]

2. Calculate the percentage of the first value with respect to the second value:

To find what percentage 750 grams is of 2500 grams, we use the formula:
[tex]\[ \text{Percentage} = \left( \frac{\text{First value}}{\text{Second value}} \right) \times 100 \][/tex]
Plugging in the values we have:
[tex]\[ \text{Percentage} = \left( \frac{750 \, \text{g}}{2500 \, \text{g}} \right) \times 100 \][/tex]

3. Perform the division and multiplication:

[tex]\[ \text{Percentage} = \left( \frac{750}{2500} \right) \times 100 = 0.3 \times 100 = 30.0 \][/tex]

Therefore, 750 grams is 30.0% of 2.5 kilograms.