KS3 Maths Quiz
Level 7-8 Numbers - Percentages - Increases and Decreases
A beehive increases by 7% a day.

Level 7-8 Numbers - Percentages - Increases and Decreases

When calculating increases or decreases of percentages, always divide by the original amount. Put your numbers hat on and practise with the following Maths quiz on the subject. If you get 100% in this quiz, you've cracked it!

  1. A beehive increases by 7% a day. Initially there are 1,250 bees. How many will there be after a week?
    A calculator is helpful for this kind of calculation! This problem is an example of compound increase. Problems like this can be solved using the compound interest formula:

    M = P( 1 + i )n

    Here, M = the final number of bees; P = the initial number of bees; i = the percentage increase (if it is a decrease, it will be negative; n = the number of days (but it could be weeks/months/years or any time period, depending on the problem) and it is the POWER to which (1 + i) has to be raised. Plug in the numbers and do the calculation
  2. Barbara bought a box of 35 pens for £40.25. She sold all the pens for £1.70 each. What was her percentage profit?
  3. Due to severe weather, a polar bear colony goes from 328 bears to 246. What percentage decrease is this?
    Remember, the change is always compared with the original value
  4. Michelle bought a caravan for £13,500 and sold it two years later for £11,200. What is the percentage loss?
  5. What percentage of 68 is 10.2?
  6. A burger now costs £3.75 after a 3% reduction in price. What was the original price of the burger?
  7. Pete's hourly wage goes up from £7.20 to £7.56. What percentage increase is this?
    The increase is 36p. To work out the percentage 0.36 / 7.2 = 0.05 = 5%
  8. The price of a concert ticket is £33 after a 7% increase. What is the original price of the ticket?
  9. The Green family bought a house five years ago for £97,000. They sell it for £185,000. What is their percentage profit (to the nearest 1%)?
  10. What percentage is 8.5 of 68?

Author: Frank Evans

Hi, we are delighted to see you - welcome to the proven way to learn and revise your curriculum subjects. Did you know that you can play every teacher-written quiz on our site for just £7.50 per month? join us here or read more about us here

Alternatively, in every section of the site you will find quizzes marked "Play" and these can all be played free of charge. We hope that you have fun and learn at the same time!

TJS - Web Design Lincolnshire

We use cookies to make your experience of our website better.

To comply with the new e-Privacy directive, we need to ask for your consent - I agree - No thanks - Find out more