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Percentage Increase and Decrease
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Percentage Increase and Decrease
For each percentage change, compare the change with the original amount: percentage change = (change ÷ original amount) × 100. Show your working and include units where needed.
A busy day on the hospital ward
The ward team is checking supply costs and stock levels. Use the original amount as the starting point for each percentage change.
1.A box of dressings cost £20. Its price increases by 15%. What is the new price?
- £22
- £23
- £25
- £17
2.A ward had 240 disposable aprons. After a delivery, the stock rose to 300. What was the percentage increase?
3.A monitor priced at £800 is reduced by 12%. Calculate its new price.
4.A medicine cupboard held 500 packs of sterile wipes. It now holds 425 packs. What percentage decrease is this?
5.The weekly cost of a supply order rises from £160 to £184. Find the percentage increase. Explain how you know which amount to divide by.
6.A trolley has 80 clean towels. After use, 30% of them are taken away. How many clean towels remain?
7.Harry says, “If a £50 item increases by 10% and then decreases by 10%, it returns to £50.” Is he correct? Work out the final price and explain.
8.A box of gloves costs £40. It is reduced by 20% in a sale, then the sale price is increased by 5% for delivery costs. What is the final total?
9.Anya checks two stock changes: bandages rise from 200 to 230, while masks fall from 400 to 340. Which has the greater percentage change in magnitude? Show both percentages.
10.A ward uses 200 rolls of tape in one month. The next month it uses 10% fewer. In the third month, use rises by 10% from the second month. How many rolls are used in the third month, and is that the original amount?
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