The salary of Wendy increased by 5% this month ,that means her salary this month is how much % of her salary last month?

Wendy's salary this month is 105% of her salary last month.

### Explanation:
- A 5% increase in salary means that Wendy's current salary is her previous salary plus an additional 5% of that amount.
- Mathematically, this can be expressed as:
  
  \[
  \text{New Salary} = \text{Old Salary} + 5\% \times \text{Old Salary} = 1.05 \times \text{Old Salary}
  \]
- Therefore, her current salary is 105% of her last month's salary.

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### Related Questions:
1. If Wendy's salary last month was $2,000, what is her salary this month after the increase?
2. If Wendy's salary this month is $2,100, what was her salary last month?
3. By what percentage would Wendy's salary need to decrease to return to her previous month's salary?
4. If Wendy received a 10% increase instead of 5%, what percentage of her last month's salary would her new salary be?
5. What would be the percentage increase if Wendy's salary this month is 120% of her last month's salary?

### Tip:
When dealing with percentage increases or decreases, always add or subtract the percentage change from 100% to find the new percentage of the original value.

Learn how to calculate the percentage increase in Wendy's salary this month compared to last month. This problem involves understanding percentage increases and applying them to calculate new values. Suitable for students in Grades 5-7.

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