1 / 12

Starter

Starter. Percentages. Public and uniformed services. What percentages are used in the uniformed services?. Percentages – what are they. To think of it as money...... 10% is 10p in the pound (100p) 20% is 20p in the pound Percent means out of 100. How to calculate a percent of an amount.

neviah
Download Presentation

Starter

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Starter

  2. Percentages

  3. Public and uniformed services • What percentages are used in the uniformed services?

  4. Percentages – what are they • To think of it as money...... • 10% is 10p in the pound (100p) • 20% is 20p in the pound • Percent means out of 100

  5. How to calculate a percent of an amount • Divide the amount by 100 and multiply it by the percent you are looking for. • So to find 10% of some thing divide the amount by 100 to find 1% and multiply it by 10. • So to find 25% of something divide it by 100 and multiply it by 25

  6. Some for you to try • 10% of £50 • 25% of 100km • 40% of $90 • 65% of 150

  7. Making a percentage • A switchboard takes 10 calls for an ambulance and 30 for the fire brigade, what percentage of calls are for ambulances? • How do we do it? • How many things (in this case phone calls) altogether? • 10 + 30 = 40, then divide the number of the thing we are after by the total number and multiply by 100 • So.....10 ÷ 40 × 100 = 25%

  8. Some for you to try • 60 ambulances do not make it to the patient within 7 minutes, 240 do, what percentage make it on time? • 10 police cars, 20 riot vans and 20 mounted police are at a football match, what percentage are cars? • 80 officers are combat trained and 40 are not, what percentage are combat trained?

  9. Fractions decimals and percentages • ¼ is 1 ÷ 4 = 0.25 • Didn’t we just say, to find a percent, it’s the bit we have/need, divided by the total and multiply by 100? • So ¼ is 1 ÷ 4 = 0.25 then 0.25 × 100 = 25% • So ½ is 1 ÷ 2 = 0.5 then 0.5 × 100 = 50%

  10. Class practice - wordier • Tammy is going on holiday and has to pay a 20% deposit, her holiday costs £1500, how much would she need to pay? • £1500 ÷ 100 = £15 • £15 × 20 = £300 • Tammy would need to pay a £300 deposit

  11. Your turn…. • Simon is calculating how much he can save towards his wedding. He believes he can save 15% of his weekly wage of £230. How much can he save per week? How much is that in a year?

  12. ….and more…. • Sophie decides that she needs a new work uniform, Uniforms4u offer the uniform at £80 but have a 30% off, Work-garbs have the uniform at £110 with a half price sale on. Which is cheapest? • Jenni needs a new laptop and is told she needs one which is at least 30% faster than her current laptop which runs at 1000Mhz. What is the minimum speed she needs?

More Related