3. a computer store sold 25 computers last week. this week, the store sold 20% more. how many did the store…
3. a computer store sold 25 computers last week. this week, the store sold 20% more. how many did the store sell this week?
Answer
Explanation:
Step1: Identify the base - number and percentage
The base - number of computers sold last week is 25, and the percentage increase is 20%.
Step2: Calculate the increase in the number of computers
The increase is 20% of 25. Using the formula for percentage increase $increase = \text{base number}\times\frac{\text{percentage}}{100}$, we have $increase=25\times\frac{20}{100}=25\times0.2 = 5$.
Step3: Calculate the number of computers sold this week
The number of computers sold this week is the sum of the number sold last week and the increase. So, $25 + 5=30$.
Answer:
30