Complete the following calculations without a calculator.

1) Increase 50 kg by 20%.

2) Increase £200 by 50%

3) Increase £90 by 15%

4) Increase 5,000 ml by 25%

5) Decreases 850 ml by 20%

6) Decreases £90 by 30%

7) Decreases 900 ml by 70%

8) Decreases £2,500 by 35%

9) I am thinking of going to America. I look at buying my tickets and they cost £500. I wait a week before purchasing the tickets and the cost of the flights has increased by 45%. What is the new cost of the tickets?

10) I purchase a coat in the sale. The original price (non-sale price) of the coat is £200. During the sale, the coat has 26% off it. What is the sale price of the coat?

11) I leave a cup of water that contains 450 ml out in the sun. 65% of the water evaporates. How much water is left in the cup?

12) I am growing some pumpkins. One of the pumpkins on the plant has a mass of 650 g. I check the mass of the pumpkin on the next day and it has increased by 5%. What is the new mass of the pumpkin?

1) Increase 50 kg by 20%.

2) Increase £200 by 50%

3) Increase £90 by 15%

4) Increase 5,000 ml by 25%

5) Decreases 850 ml by 20%

6) Decreases £90 by 30%

7) Decreases 900 ml by 70%

8) Decreases £2,500 by 35%

9) I am thinking of going to America. I look at buying my tickets and they cost £500. I wait a week before purchasing the tickets and the cost of the flights has increased by 45%. What is the new cost of the tickets?

10) I purchase a coat in the sale. The original price (non-sale price) of the coat is £200. During the sale, the coat has 26% off it. What is the sale price of the coat?

11) I leave a cup of water that contains 450 ml out in the sun. 65% of the water evaporates. How much water is left in the cup?

12) I am growing some pumpkins. One of the pumpkins on the plant has a mass of 650 g. I check the mass of the pumpkin on the next day and it has increased by 5%. What is the new mass of the pumpkin?