Answer:
25%
Explanation:
Let George's salary = $50,000 per year
If his salary dropped by 20%, then his salary would be 80% of his previous salary (as 100% - 20% = 80%).
Convert 80% to a decimal: 80% = 80/100 = 0.8
Therefore, 80% of 50000 = 0.8 x 50000 = $40,000
We wish to increase his salary back to the original amount of $50,000.
The difference between the two salaries is : 50000 - 40000 = 10000
Therefore, we need to calculate the percentage that $10,000 is of $40,000.
⇒ (10000 / 40000) x 100 = 25%
So George's salary needs to increase by 25% to get back to where it was before the salary drop.