Find a number :
Which when decreased by `3.4%` becomes 483.

Answer

To find the number which, when decreased by 3.4%, becomes 483, we can follow these steps:

### Step-by-Step Solution:

1. **Let the number be x.**
- We are looking for a number, so we can denote it as \( x \).

2. **Set up the equation based on the problem statement.**
- According to the problem, when \( x \) is decreased by 3.4%, it equals 483. This can be expressed as:
\[ x - 3.4\% \text{ of } x = 483 \]

3. **Convert the percentage to a decimal.**
- 3.4% can be written as \( \frac{3.4}{100} \) or \( 0.034 \). Therefore, we can rewrite the equation:
\[ x - 0.034x = 483 \]

4. **Combine like terms.**
- The left side of the equation can be simplified:
\[ (1 - 0.034)x = 483 \]
\[ 0.966x = 483 \]

5. **Solve for x.**
- To find \( x \), divide both sides by 0.966:
\[ x = \frac{483}{0.966} \]

6. **Calculate the value of x.**
- Performing the division:
\[ x \approx 500 \]

### Final Answer:
The number is \( 500 \).