In a class, three are 30 boys and 25 girls. Find the ratio of the number of
boys to that of girls.

Answer

To find the ratio of the number of boys to the number of girls in the class, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the number of boys and girls:**
- Number of boys = 30
- Number of girls = 25

2. **Set up the ratio:**
- The ratio of boys to girls can be expressed as:
\[ \text{Ratio} = \frac{\text{Number of boys}}{\text{Number of girls}} = \frac{30}{25} \]

3. **Simplify the ratio:**
- To simplify the fraction \(\frac{30}{25}\), we can divide both the numerator and the denominator by their greatest common divisor (GCD), which is 5.
- Dividing both by 5:
\[ \frac{30 \div 5}{25 \div 5} = \frac{6}{5} \]

4. **Express the ratio in the standard form:**
- The simplified ratio of the number of boys to the number of girls is:
\[ 6 : 5 \]

### Final Answer:
The ratio of the number of boys to the number of girls is **6 : 5**.