What percent of `7.2` kg is 18 gms ?

Options

A. `.025%`
B. `.25%`
C. `2.5%`
D. `25%`

Answer

To find out what percent of `7.2` kg is `18` grams, we can follow these steps:

### Step 1: Convert kilograms to grams
Since we need to compare the two quantities in the same unit, we first convert `7.2` kg to grams.

1 kg = 1000 grams, so:
\[ 7.2 \text{ kg} = 7.2 \times 1000 \text{ grams} = 7200 \text{ grams} \]

### Step 2: Set up the percentage equation
Let \( x \) be the percentage we want to find. The equation for finding the percentage is:
\[ \frac{18 \text{ grams}}{7200 \text{ grams}} \times 100 = x \]

### Step 3: Simplify the fraction
Now, we can simplify the fraction:
\[ \frac{18}{7200} \]
To simplify, we can divide both the numerator and the denominator by `18`:
\[ \frac{18 \div 18}{7200 \div 18} = \frac{1}{400} \]

### Step 4: Calculate the percentage
Now we can substitute back into our percentage equation:
\[ x = \frac{1}{400} \times 100 \]
\[ x = \frac{100}{400} \]
\[ x = 0.25 \]

### Conclusion
Thus, \( 18 \) grams is \( 0.25\% \) of \( 7.2 \) kg.

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