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Percentages of Whole Numbers

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Percentages of Whole Numbers

Work out each percentage. Show your calculations for the money problems and include dollar signs in your answers.

Calculate Percentages

1.Find 40% of 90.

2.Calculate 12% of 200.

3.What is 35% of 160?

4.Work out 8% of 350.

5.Select every valid method for finding a percentage of a number.

Convert the percentage to a decimal and multiply by the number
Convert the percentage to an equivalent fraction and multiply
Use known percentages such as 10% and combine them
Add the percentage value to the original number

Percentages in Everyday Money

6.A rain jacket is priced at $95. A sale takes 20% off. How many dollars are taken off the price?

7.A café order costs $64 before GST. Calculate the GST amount at 15%.

8.A scooter costs $280. It is discounted by 30%. What is the price after the discount?

9.Wiremu receives $520 each week and puts 15% of it into savings. How much does he save each week?

Apply and Explain

10.A tablet costs $750. The shop takes 12% off, then adds 15% GST to the reduced price. What is the final price, to the nearest cent?

11.Describe one reliable way to calculate 35% of a number. Include the calculation steps using a number of your choice.

12.Which strategy would you choose to calculate 18% of 250: use a decimal, split it into familiar percentages, or use an equivalent fraction? Give a reason for your choice.