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A man earns $1200 after a 25% increase in his salary. What was his original sala

Practice Questions

Q1
A man earns $1200 after a 25% increase in his salary. What was his original salary?
  1. $800
  2. $900
  3. $1000
  4. $1100

Questions & Step-by-Step Solutions

A man earns $1200 after a 25% increase in his salary. What was his original salary?
Correct Answer: 960
  • Step 1: Let the original salary be represented by 'x'.
  • Step 2: A 25% increase in the salary means the new salary is 'x + 0.25x'.
  • Step 3: Combine 'x' and '0.25x' to get '1.25x'.
  • Step 4: Set the equation '1.25x = 1200' because the new salary is $1200.
  • Step 5: To find 'x', divide both sides of the equation by 1.25: 'x = 1200 / 1.25'.
  • Step 6: Calculate '1200 / 1.25' to find the original salary.
  • Percentage Increase – Understanding how to calculate the original value before a percentage increase is applied.
  • Algebraic Manipulation – Using algebra to solve for an unknown variable in an equation.
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