Increase and Decrease by a Percentage
The below QuickQuestion Interface © generates random questions on increasing or decreasing a value by a percentage.
Choose which types of percentages you would like to deal with (Non-Calculator percentages are 1%, 5%, 10%, 20%, 25%, 50%, 75%).
Decide on if you want to have questions involving increasing by a percentage or decreasing, or choose Random to get a mixture of both.
Finally decide if you want the calculate the actual final amount, or just to find the multiplier needed to do the calculation.
When typing answers, give them to 3 d.p.
There is a 10QQI version of this activity.
Choose which types of percentages you would like to deal with (Non-Calculator percentages are 1%, 5%, 10%, 20%, 25%, 50%, 75%).
Decide on if you want to have questions involving increasing by a percentage or decreasing, or choose Random to get a mixture of both.
Finally decide if you want the calculate the actual final amount, or just to find the multiplier needed to do the calculation.
When typing answers, give them to 3 d.p.
There is a 10QQI version of this activity.
Ideas for Teachers
The QQI activities are a great way to get all students working. Put random questions on the board, and then get students to answer them on mini-whiteboards. Once all students have answered, and held up their solutions (with working), reveal the answer to see if they were right. Discuss any misconceptions from the working they have shown, or if they have all got it correct, move on to another question (changing the options to make if more difficult if necessary).
The QQI activities are a great way to get all students working. Put random questions on the board, and then get students to answer them on mini-whiteboards. Once all students have answered, and held up their solutions (with working), reveal the answer to see if they were right. Discuss any misconceptions from the working they have shown, or if they have all got it correct, move on to another question (changing the options to make if more difficult if necessary).
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